Core Application, Compatibility & Target User Needs
This guide focuses on the JYS-21 and JYS-25 pressure reducing and regulating valves, which are critical components exclusively engineered for BPMF and BPM Blowout Preventer (BOP) Control Systems—essential safety equipment in onshore and offshore oil and gas drilling operations. These valves are fully compatible with BPMF-1000/1500/2000 and BPM-800/1200 series BOP control systems, designed to precisely regulate hydraulic pressure to ensure reliable actuation of BOP rams, annular preventers, and other safety-critical components.
Tailored to the segmented needs of drilling site maintenance supervisors, BOP system technical engineers, and oilfield equipment procurement managers, the core purpose of this guide is to provide a dual-value reference: a clear procurement benchmark (sorted part specifications, material details, and performance适配性) and a practical technical troubleshooting tool (wear mechanisms, preventive maintenance measures). Key pain points addressed include unplanned BOP system downtime caused by valve part failure, compromised safety due to substandard replacement parts, and high maintenance costs from improper part selection or usage. By delivering detailed, application-specific guidance, this guide empowers users to select the correct parts, extend valve service life, and maintain the integrity of BOP control systems—critical for compliance with API 16D and local oilfield safety regulations.
1. Actuation & Adjustment Components
Actuation & Adjustment Components are the operational interface of the JYS-21/25 pressure reducing valve, responsible for manual pressure adjustment and locking the set pressure. Scene-anchored in harsh drilling environments—where operators frequently adjust pressure under high-pressure, high-vibration conditions—this category directly addresses pain points such as handle/hand wheel slippage, adjusting screw wear, and locking mechanism failure, which can lead to unstable pressure regulation and potential BOP misoperation. Value is front-loaded through the components’ robust construction and anti-slip design, ensuring precise, reliable adjustment even in greasy, high-vibration oilfield settings.
No. | Part Name | Part No. | Material Specification | Primary Wear Causes | Damage Prevention Precautions |
1 | Locking handle | 9161100003 | Body: High-strength carbon steel (45#) with zinc plating; Grip: Nitrile rubber (NBR) with anti-slip texture | Rubber grip degradation from oil exposure and UV radiation; Steel body corrosion in offshore saltwater environments; Internal locking mechanism wear from repeated tightening/loosening | Clean the grip with a mild degreaser after use; Apply a UV-resistant rubber protectant quarterly for onshore applications; Rinse with fresh water and dry thoroughly after offshore use to prevent corrosion; Avoid over-tightening (use torque wrench set to 15-20 N·m) to reduce locking mechanism wear |
2 | Hand wheel | 9161100001 | Rim: Ductile iron (QT450-10) with epoxy coating; Hub: Carbon steel (40Cr) with quenching treatment; Grip surface: Knurled steel with anti-rust oil coating | Epoxy coating peeling from impact during transportation/maintenance; Knurled surface wear from frequent manual operation; Hub thread damage from misalignment during adjustment | Store and transport with a protective foam cover; Avoid using pliers or wrenches to turn the hand wheel (use only manual force); Inspect thread engagement monthly for smooth operation—apply a thin layer of anti-seize compound (copper-based) if resistance is felt; Touch up peeling coating with matching epoxy paint immediately |
3 | Adjusting screw | 9161100002 | Shaft: Alloy steel (42CrMo) with carburizing treatment (surface hardness HRC 50-55); Thread: Precision rolled trapezoidal thread (TR20×4) | Thread wear from repeated adjustment and hydraulic oil contamination; Shaft bending due to lateral force during operation; Corrosion of unplated thread roots in humid environments | Rotate the screw smoothly without applying lateral pressure; Clean the thread with hydraulic oil and a soft brush monthly to remove debris; Apply a thin layer of high-pressure hydraulic grease (compatible with system oil) to the thread before assembly; Inspect for shaft straightness annually using a dial gauge (maximum allowable runout: 0.1mm) |
2. Fastening Components
Fastening Components secure critical valve parts (flanges, covers, plungers) to maintain hydraulic integrity and structural stability. Scene-anchored in high-vibration oilfield environments—where constant vibration can loosen fasteners, leading to hydraulic leaks and valve failure—this category addresses pain points such as screw thread stripping, nut loosening, and corrosion-related fastener failure. Value is front-loaded through the use of high-strength, corrosion-resistant materials and precision machining, ensuring reliable fastening even under extreme vibration and harsh environmental conditions.
No. | Part Name | Part No. | Material Specification | Primary Wear Causes | Damage Prevention Precautions |
1 | Hidden hex-flat end screw | 4201030190 | Shaft: High-strength alloy steel (35CrMoA) with black oxide finish; Head: Hexagonal socket with precision machining; Thread: Metric fine thread (M8×1.25) | Socket wear from improper tool use (mismatched hex key); Thread stripping from over-tightening; Corrosion of black oxide finish in humid/offshore environments | Use only high-quality, size-matched hex keys (avoid worn or undersized tools); Tighten to manufacturer’s specified torque (8-10 N·m) using a torque wrench; For offshore applications, apply a corrosion-resistant thread sealant (PTFE-based) before assembly; Inspect sockets for wear quarterly—replace if rounding is detected |
2 | Hexangular thin nut | 4204000140 | Material: High-strength carbon steel (35#) with zinc-nickel plating; Thread: Metric fine thread (M8×1.25); Thickness: 5mm (thin design for confined spaces) | Plating wear leading to corrosion; Thread deformation from vibration; Nut rounding from improper wrench use | Use a box-end wrench (instead of open-end) to minimize rounding; Apply a vibration-resistant thread locker (Loctite 243) during assembly; Inspect plating for damage monthly—touch up with zinc-rich paint if needed; Replace nuts every 2 years as preventive maintenance in offshore environments |
3 | Hidden hex screw | 4201120250 | Shaft: Alloy steel (40Cr) with quenching and tempering treatment; Finish: Black oxide with anti-corrosion oil coating; Thread: M10×1.5 | Thread galling during assembly; Shaft breakage from over-tightening; Corrosion in oil-contaminated, humid environments | Avoid cross-threading by hand-threading the screw fully before applying tools; Tighten to 12-15 N·m torque; Clean the screw with a degreaser and reapply anti-corrosion oil every 6 months; Use a thread chaser to clean tapped holes before assembly to prevent galling |
4 | Hidden hex screw | 4201120090 | Shaft: High-strength alloy steel (35CrMoA); Finish: Zinc plating; Thread: M6×1.0 | Zinc plating corrosion in saltwater environments; Socket damage from small, worn hex keys; Thread wear from repeated disassembly | For offshore use, replace with stainless steel (316L) equivalents if compatible; Use only precision hex keys (Class H tolerance); Limit disassembly to necessary maintenance only; Apply a thin layer of anti-seize compound to threads before assembly |
5 | Hidden hex screw | 4201120240 | Shaft: Alloy steel (42CrMo) with carburizing treatment; Finish: Black oxide; Thread: M12×1.75 | Shaft fatigue from high vibration; Thread stripping from misalignment; Corrosion in damp onshore drilling environments | Inspect for fatigue cracks annually using magnetic particle testing; Ensure proper alignment of the screw with the tapped hole before tightening; Tighten to 20-25 N·m torque; Store spare screws in a dry, oiled container to prevent corrosion |
3. Sealing Components
Sealing Components are critical for maintaining hydraulic pressure integrity in the JYS-21/25 valve, preventing oil leaks that can lead to BOP control system failure. Scene-anchored in high-pressure hydraulic systems (typical working pressure: 10-35 MPa) with exposure to hydraulic oil, high temperatures (up to 120°C), and environmental contaminants (dust, saltwater), this category addresses pain points such as O-ring hardening/cracking, sealing ring extrusion, and premature wear from misalignment. Value is front-loaded through the use of oil-resistant, high-temperature elastomers and precision-machined sealing surfaces, ensuring reliable sealing performance even under extreme oilfield conditions.
No. | Part Name | Part No. | Material Specification | Primary Wear Causes | Damage Prevention Precautions |
1 | O ring | 5303001270 | Nitrile Butadiene Rubber (NBR) 70 Shore A; Hardness: 68-72 HA; Temperature range: -20°C to 120°C; Compatible with mineral-based hydraulic oils (ISO VG 32/46) | Hardening and cracking from prolonged exposure to high temperatures; Swelling and degradation from incompatible hydraulic fluids; Extrusion through gland gaps under high pressure | Ensure system hydraulic oil is compatible with NBR (avoid synthetic esters); Inspect for hardening/cracking every 6 months—replace if Shore hardness exceeds 80 HA; Check gland gap dimensions during maintenance (maximum allowable gap: 0.15mm); Store spare O-rings in a cool, dry, dark environment (avoid direct sunlight and oil contact) |
2 | O ring | 5303001040 | NBR 65 Shore A; Temperature range: -30°C to 110°C; Low-temperature flexibility for cold-climate drilling applications | Brittleness and cracking in low-temperature environments (below -20°C); Abrasion from contaminated hydraulic oil; Compression set from prolonged static loading | For cold-climate use (arctic drilling), pre-heat the valve to above 0°C before operation; Install a 10μm oil filter to remove abrasive contaminants; Avoid prolonged static pressure on the seal (relieve system pressure during downtime); Replace seals every 12 months in low-temperature applications |
3 | Oil-drain sealing ring | 9161100021 | Fluororubber (FKM/Viton) 75 Shore A; Temperature range: -15°C to 200°C; Resistance to high-temperature hydraulic oil and chemical contaminants | Chemical degradation from contact with incompatible additives in hydraulic oil; Compression set from high-temperature operation; Abrasion from metal-to-seal contact | Verify hydraulic oil additive compatibility with FKM (avoid amine-based additives); Inspect for compression set quarterly (maximum allowable set: 20%); Ensure sealing surfaces are smooth (Ra ≤ 0.8μm) and free of burrs; Apply a thin layer of FKM-compatible grease during assembly |
4 | O ring | 5303001350 | Hydrogenated Nitrile Rubber (HNBR) 70 Shore A; Temperature range: -40°C to 150°C; High resistance to oil, ozone, and oxidation | Ozone degradation in onshore, high-altitude environments; Wear from dynamic movement (plunger reciprocation); Swelling from overexposure to hydraulic oil | Store spare seals in ozone-free packaging; Inspect dynamic sealing surfaces (plunger) for wear monthly—polish if scratches are detected; Limit oil exposure during storage (keep seals in oil-free containers); Replace every 18 months in dynamic applications |
5 | O ring | 5303001330 | NBR 75 Shore A; Temperature range: -20°C to 120°C; High compression strength for high-pressure applications (up to 40 MPa) | Extrusion through gland gaps at high pressure; Hardening from thermal cycling; Abrasion from contaminated oil | Ensure gland design meets high-pressure standards (use anti-extrusion rings if necessary); Avoid rapid temperature changes (allow valve to warm up/cool down gradually); Maintain oil cleanliness (ISO 14/11/8); Tighten flange bolts evenly to prevent uneven seal compression |
6 | O ring | 5303001180 | NBR 60 Shore A; Temperature range: -25°C to 110°C; Soft design for irregular sealing surfaces | Pinhole leaks from surface irregularities; Compression set from over-tightening; Degradation from UV exposure (onshore applications) | Inspect sealing surfaces for irregularities before assembly; Tighten fasteners to specified torque (avoid over-compression); For onshore use, apply a UV-resistant coating to exposed seal edges; Replace if pinhole leaks are detected |
7 | O ring | 5303001130 | FKM 70 Shore A; Temperature range: -10°C to 200°C; High chemical resistance for harsh oilfield environments | Chemical attack from drilling fluids (if leaked into hydraulic system); High-temperature degradation; Wear from static loading | Install a check valve to prevent drilling fluid contamination; Monitor system temperature (avoid exceeding 200°C); Relieve static pressure during long-term downtime; Inspect for chemical damage (discoloration, swelling) monthly |
8 | Pressure reducing sealing ring | 9161200017 | PTFE-reinforced NBR composite; Hardness: 72 Shore A; Temperature range: -30°C to 150°C; Low friction for dynamic pressure regulation | PTFE layer wear from dynamic pressure fluctuations; NBR degradation from oil exposure; Delamination of composite layers from improper assembly | Avoid sudden pressure spikes (install a pressure relief valve upstream); Inspect composite layer adhesion quarterly—replace if delamination is detected; Apply a thin layer of compatible grease during assembly (avoid petroleum-based greases on PTFE); Limit dynamic pressure cycles to 10,000 per year (replace after exceeding limit) |
9 | O ring | 5303001010 | HNBR 65 Shore A; Temperature range: -40°C to 160°C; High resistance to oxidation and thermal aging | Thermal aging in high-temperature, continuous-operation systems; Wear from metal-to-seal contact; Ozone degradation in high-altitude areas | Monitor system temperature (avoid continuous operation above 150°C); Polish sealing surfaces to Ra ≤ 0.6μm; Store spares in ozone-free, temperature-controlled environments; Replace every 2 years in continuous-operation systems |
4. Structural & Functional Core Components
Structural & Functional Core Components form the backbone of the JYS-21/25 valve, responsible for pressure regulation, fluid flow control, and structural integrity. Scene-anchored in high-pressure, high-vibration oilfield operations—where component failure can result in catastrophic BOP system malfunction—this category addresses pain points such as valve body cracking, plunger wear, spring fatigue, and bearing failure. Value is front-loaded through the use of high-strength alloys, precision machining, and fatigue-resistant materials, ensuring reliable performance under the most demanding oilfield conditions.
No. | Part Name | Part No. | Material Specification | Primary Wear Causes | Damage Prevention Precautions |
1 | Spring foundation | 9161100008 | Alloy steel (40Cr) with quenching and tempering treatment; Surface: Black oxide finish; Load-bearing surface: Precision ground (Ra ≤ 0.8μm) | Surface wear from spring oscillation; Fatigue cracking from repeated load cycles; Corrosion in humid environments | Inspect load-bearing surface for wear monthly—polish if roughness exceeds Ra 1.2μm; Check for fatigue cracks annually using ultrasonic testing; Apply anti-corrosion oil to the surface every 6 months; Ensure proper alignment of the spring to avoid uneven loading |
2 | Orienting sleeve | 9161200010 | Bronze alloy (CuSn10Pb10); Self-lubricating properties; Precision machined inner diameter (tolerance H7) | Wear from plunger reciprocation; Scoring from contaminated hydraulic oil; Corrosion from saltwater (offshore applications) | Maintain oil cleanliness (ISO 14/11/8); Inspect inner diameter for wear quarterly—replace if clearance exceeds 0.2mm; For offshore use, flush with fresh water after exposure to saltwater; Apply a thin layer of copper-compatible grease during assembly |
3 | Oil-inlet flange | 9161100014 | Carbon steel (Q235B) with epoxy coating; Flange face: Raised face (RF) with serrated finish; Bolt holes: Precision drilled (tolerance H12) | Coating peeling from impact; Flange face wear from repeated gasket replacement; Corrosion in offshore/saltwater environments | Handle with care during installation to avoid impact damage; Use a gasket scraper to remove old gasket material without damaging the serrated finish; For offshore use, upgrade to 316L stainless steel flanges; Inspect bolt holes for deformation quarterly |
4 | Valve body | 9161100011 | Forged carbon steel (WCB) with internal chrome plating; Internal flow passages: Precision honed (Ra ≤ 0.4μm); Working pressure rating: 42 MPa | Internal plating wear from abrasive contaminants in oil; Cracking from pressure spikes; Corrosion of external surface in humid environments | Install a high-efficiency oil filter (5μm) upstream; Avoid pressure spikes by maintaining a stable system pressure (±5% of set pressure); Inspect external surface for corrosion monthly—touch up with epoxy paint if needed; Perform ultrasonic thickness testing annually to check for wall thinning |
5 | Connecting rod | 9161200010 | Alloy steel (42CrMo) with carburizing treatment; Surface hardness: HRC 55-60; Pin holes: Precision reamed (tolerance H8) | Pin hole wear from cylinder pin rotation; Fatigue bending from misalignment; Corrosion of unplated surfaces | Ensure proper alignment with the plunger and valve stem; Inspect pin hole wear quarterly—replace if clearance exceeds 0.15mm; Apply anti-corrosion oil to unplated surfaces monthly; Check for fatigue bending using a straightedge annually |
6 | Cylinder pin | 4207010080 | Alloy steel (35CrMoA) with quenching and tempering treatment; Surface: Zinc plating; Diameter tolerance: f7 | Wear from rotational movement; Plating wear leading to corrosion; Bending from lateral forces | Lubricate with high-pressure grease during assembly; Inspect for wear and corrosion monthly; Replace if diameter reduction exceeds 0.1mm; Ensure connecting rod pin holes are free of burrs to avoid uneven wear |
7 | Retaining ring | 9161100020 | Spring steel (65Mn) with phosphating treatment; Hardness: HRC 45-50; Thickness: 2mm | Fatigue failure from repeated expansion/contraction; Phosphating wear leading to corrosion; Deformation during installation/removal | Use proper retaining ring pliers (avoid screwdrivers or other tools) during installation/removal; Inspect for fatigue cracks quarterly; Replace after 5 installation/removal cycles; Store in a dry, oiled container to prevent corrosion |
8 | Sealing case | 9161200015 | Aluminum alloy (6061-T6) with anodized finish; Internal sealing groove: Precision machined (tolerance H9); Lightweight design for reduced valve weight | Anodized finish wear from sealing ring friction; Internal groove wear from dynamic sealing; Corrosion in saltwater environments | Inspect internal groove for wear monthly—replace if groove width increases by 0.1mm; For offshore use, apply a corrosion-resistant coating over the anodized finish; Avoid over-tightening fasteners to prevent case deformation; Use compatible seals to minimize friction |
9 | Spring | 9161200016 | Spring steel (50CrVA) with shot peening treatment; Wire diameter: 3mm; Spring rate: 5 N/mm; Temperature range: -40°C to 180°C | Fatigue failure from repeated compression cycles; Corrosion in humid/oily environments; Set deformation from over-compression | Avoid compressing the spring beyond its solid height (maximum compression: 80% of free length); Inspect for fatigue cracks annually using magnetic particle testing; Apply anti-rust oil to the spring every 6 months; Replace after 1 million compression cycles or if set deformation exceeds 2% |
10 | Waving spring | 9161100022 | Stainless steel (17-7PH) with precipitation hardening; Thickness: 0.5mm; Wave height: 2mm; Corrosion-resistant design | Fatigue failure from high-frequency vibration; Corrosion in saltwater (offshore); Deformation from uneven loading | Ensure even loading during assembly; Inspect for fatigue waves (flattening) quarterly; For offshore use, verify 17-7PH compatibility with saltwater; Replace after 500,000 vibration cycles or if wave height reduces by 30% |
11 | Plunger | 9161100024 | Stainless steel (304) with hard chrome plating; Surface hardness: HRC 60-65; Diameter tolerance: f7; Surface roughness: Ra ≤ 0.2μm | Chrome plating wear from dynamic sealing; Scratching from contaminated oil; Corrosion in chloride-rich environments (offshore) | Maintain oil cleanliness (ISO 13/10/7); Inspect surface for scratches monthly—polish with fine abrasive paste if needed; For offshore use, use 316L stainless steel plungers; Apply a thin layer of hydraulic oil to the surface before assembly to reduce friction |
12 | Down plug | 9161100018 | Carbon steel (45#) with zinc plating; Thread: Metric fine thread (M20×1.5); Sealing surface: Tapered (1:16) | Thread wear from repeated assembly; Tapered sealing surface wear; Corrosion in humid environments | Apply thread sealant (PTFE-based) during assembly; Avoid over-tightening (torque: 25-30 N·m); Inspect tapered surface for wear quarterly—re-face if necessary; Replace zinc-plated plugs with stainless steel in offshore applications |
13 | Flange | 9161100024 | Stainless steel (304); Flange type: Blind flange; Sealing face: Flat face (FF) with gasket groove | Gasket groove wear from repeated gasket replacement; Corrosion in chloride environments; Bolt hole deformation from over-tightening | Use a soft gasket scraper to avoid groove damage; For offshore use, upgrade to 316L stainless steel; Tighten bolts evenly using a cross-torque pattern; Inspect bolt holes for deformation annually |
14 | Oil-outlet flange | 9161100025 | Carbon steel (Q235B) with epoxy coating; Flange face: Raised face (RF); Flow passage: 25mm diameter (JYS-25) / 21mm diameter (JYS-21) | Coating peeling from impact; Flow passage erosion from high-velocity fluid; Corrosion in damp environments | Handle with care during transportation/installation; Monitor fluid velocity (maximum: 5 m/s) to avoid erosion; Inspect flow passage for erosion annually—repair with weld overlay if needed; Touch up epoxy coating monthly |
15 | Spring adjusting cover | 9161101000 | Alloy steel (40Cr) with black oxide finish; Thread: Trapezoidal thread (TR25×5); Internal shoulder: Precision ground | Thread wear from repeated adjustment; Internal shoulder wear from spring contact; Corrosion in oily environments | Apply anti-seize compound to threads before assembly; Adjust smoothly without applying excessive force; Inspect internal shoulder for wear quarterly—polish if needed; Clean threads with a wire brush and reapply anti-seize every 6 months |
16 | Big spring | 9161100006 | Spring steel (50CrVA) with shot peening and zinc plating; Wire diameter: 8mm; Spring rate: 20 N/mm; Maximum load: 5000 N | Fatigue failure from high-load cycles; Corrosion from saltwater (offshore); Set deformation from over-compression | Never exceed the maximum load rating; Inspect for fatigue cracks annually using magnetic particle testing; For offshore use, use hot-dip galvanized springs; Replace after 500,000 compression cycles or if set deformation exceeds 1.5% |
17 | Oil-inlet plunger | 9161200019 | Stainless steel (316L) with hard chrome plating; Surface hardness: HRC 62-67; Diameter tolerance: f6; Sealing edge: Sharp (30° angle) | Chrome plating wear from dynamic sealing; Sealing edge damage from contaminated oil; Corrosion in chloride-rich environments | Maintain oil cleanliness (ISO 12/9/6); Inspect sealing edge for nicks monthly—re-sharpen if needed; Avoid contact with hard objects during maintenance; Apply a thin layer of food-grade grease (compatible with hydraulic oil) to the sealing edge during assembly |
18 | Small spring | 9161100007 | Spring steel (65Mn) with phosphating treatment; Wire diameter: 1.5mm; Spring rate: 2 N/mm; Temperature range: -30°C to 150°C | Fatigue failure from high-frequency vibration; Corrosion in humid environments; Tangling during storage/installation | Store in a rigid container to avoid tangling; Inspect for fatigue cracks quarterly; Apply anti-rust oil every 3 months; Replace after 1.5 million vibration cycles |
19 | Spring director | 9161200005 | Aluminum alloy (6063-T5) with anodized finish; Internal diameter: Precision machined (tolerance H8); Length: 50mm | Anodized finish wear from spring contact; Internal diameter wear from spring oscillation; Deformation from uneven spring loading | Ensure proper spring alignment to avoid uneven loading; Inspect internal diameter for wear quarterly—replace if clearance exceeds 0.15mm; Apply a thin layer of aluminum-compatible grease to the internal surface; Avoid over-tightening the spring adjusting cover to prevent deformation |
20 | Bearing | 4301000060 | Deep groove ball bearing (6205); Inner ring: Chrome steel (GCr15); Outer ring: Chrome steel (GCr15); Seals: Double rubber seals (2RS); Lubrication: High-temperature grease | Grease degradation from high temperatures; Bearing raceway wear from contaminated oil; Seal failure leading to dust/oil intrusion | Monitor bearing temperature (maximum safe temperature: 120°C); Replace grease every 6 months with high-temperature, anti-corrosion grease; Ensure oil cleanliness (ISO 14/11/8); Inspect seals for damage monthly—replace if cracked or hardened |
21 | Bearing cover | 9161200014 | Carbon steel (45#) with zinc plating; Internal shoulder: Precision ground; Sealing groove: For O-ring (5303001010) | Zinc plating corrosion; Internal shoulder wear from bearing contact; Sealing groove wear from O-ring friction | Apply anti-corrosion oil to the surface monthly; Inspect internal shoulder for wear quarterly—replace if wear exceeds 0.1mm; Check sealing groove for damage during O-ring replacement; For offshore use, upgrade to stainless steel (304) |
22 | Sealing plunger | 9161100004 | Stainless steel (316) with PTFE coating; Surface hardness: HRC 55-60; Sealing diameter: 25mm (JYS-25) / 21mm (JYS-21); Low-friction design | PTFE coating wear from dynamic sealing; Stainless steel corrosion in chloride environments; Sealing edge damage from debris | Maintain oil cleanliness (ISO 13/10/7); Avoid contact with sharp objects during maintenance; For offshore use, use 316L with enhanced PTFE coating; Inspect coating for wear monthly—replace if base metal is exposed |
23 | Elastic retaining ring for rod | 4206020150 | Spring steel (65Mn) with phosphating treatment; Inner diameter: 20mm; Thickness: 1.5mm; Hardness: HRC 42-48 | Fatigue failure from repeated expansion; Phosphating wear leading to corrosion; Deformation during installation | Use proper retaining ring pliers during installation; Inspect for fatigue cracks quarterly; Replace after 3 installation cycles; Store in a dry, oiled container to prevent corrosion |
Procurement Guidance
The JYS-21 and JYS-25 pressure reducing and regulating valves are critical for maintaining the safety and reliability of BPMF/BPM BOP control systems—any compromise in part quality can lead to severe operational risks and compliance issues. When procuring replacement parts, prioritize components that meet the original equipment manufacturer (OEM) specifications outlined in this guide, ensuring compatibility with your BOP control system model. Our comprehensive range of genuine replacement parts is engineered to match the exact form, fit, and function of the original components, delivering long service life, reduced maintenance costs, and peace of mind in critical oilfield operations. Whether you require actuation components, fasteners, seals, or core structural parts, we offer a one-stop procurement solution tailored to your oilfield’s specific needs. Contact our technical sales team today to discuss your requirements and secure the high-quality parts your BOP control system demands.