Oilfield Equipment & Parts: Technical Catalog & Procurement Guide

1

3WH6A5X

Housing: Alloy Steel (42CrMo); Spool: Stainless Steel (1.4404); Seals: FKM (Fluoroelastomer); Hardware: High-Tensile Steel (10.9 grade)

Spool galling due to contaminated hydraulic fluid; seal degradation from high-temperature exposure (above 120°C); valve body corrosion from saltwater (offshore environments)

Maintain hydraulic fluid cleanliness to ISO 4406 Class 16/13/10; replace hydraulic filters every 500 operating hours. For offshore use, apply anti-corrosion coating to valve exterior annually. Avoid exceeding maximum operating temperature (150°C for FKM seals). Inspect spool movement quarterly—lubricate with hydraulic fluid-compatible grease if resistance is detected.

2

3WH6B/53

Housing: Ductile Iron (GGG40); Spool: Chrome-Plated Steel; Seals: NBR (Nitrile Rubber); Hardware: Alloy Steel (8.8 grade)

Seal swelling from exposure to oil-based drilling fluids; spool wear from cyclic loading; valve seat damage from pressure surges

Verify seal compatibility with hydraulic fluid type (NBR for mineral oil-based fluids only). Install pressure relief valves upstream to prevent surges exceeding 35MPa. Conduct leak testing monthly using nitrogen (2MPa) to detect seal degradation early. Store replacement valves in a dry, cool environment (15-25°C) to prevent seal hardening.

3

3WH6B50B

Housing: Alloy Steel (4140); Spool: Stainless Steel (1.4301); Seals: PTFE-Encapsulated O-Rings; Hardware: Stainless Steel (1.4401)

PTFE seal wear from excessive spool speed; valve body fatigue from high-frequency actuation; internal corrosion from H2S exposure (sour service)

Limit spool actuation frequency to ≤10 cycles per minute. For sour service (H2S >50ppm), verify compliance with NACE MR0175/ISO 15156 before installation. Inspect valve internals annually using endoscopy to detect corrosion or seal wear. Apply thread-locking adhesive (Loctite 243) to mounting hardware to prevent vibration loosening.

4

4WH6D50B

Housing: Forged Steel (A105); Spool: Heat-Treated Alloy Steel; Seals: FKM/Viton; Hardware: High-Tensile Alloy Steel (12.9 grade)

Spool scoring from abrasive particles in hydraulic fluid; seal extrusion under high pressure; valve stem breakage from misalignment during installation

Install a 10μm inline filter upstream of the valve to remove abrasive particles. Ensure valve is mounted with proper alignment (max misalignment ≤0.5mm) to prevent stem stress. Torque mounting bolts to OEM specifications (25-30 N·m) using a calibrated torque wrench. Replace seals every 12 months in high-pressure applications (≥30MPa).

5

4WMM16G50B/F

Housing: Cast Steel (WCB); Spool: Chrome-Plated Alloy Steel; Seals: Polyurethane (PU); Hardware: Alloy Steel (10.9 grade)

PU seal compression set from long-term static pressure; valve body cavitation from low inlet pressure; spool sticking from moisture contamination

Relieve static pressure on the valve during shutdowns (≥72 hours) to prevent seal compression set. Maintain minimum inlet pressure of 1MPa to avoid cavitation. Drain and filter hydraulic fluid if moisture content exceeds 0.1%. Inspect spool movement monthly—disassemble and clean if sticking occurs, replacing worn seals as needed.

6

4WMM16G50B

Housing: Cast Steel (WCB); Spool: Chrome-Plated Alloy Steel; Seals: Polyurethane (PU); Hardware: Alloy Steel (10.9 grade)

PU seal compression set from long-term static pressure; valve body cavitation from low inlet pressure; spool sticking from moisture contamination

Relieve static pressure on the valve during shutdowns (≥72 hours) to prevent seal compression set. Maintain minimum inlet pressure of 1MPa to avoid cavitation. Drain and filter hydraulic fluid if moisture content exceeds 0.1%. Inspect spool movement monthly—disassemble and clean if sticking occurs, replacing worn seals as needed.

7

4WMM6D50B/F

Housing: Ductile Iron (GGG50); Spool: Stainless Steel (1.4404); Seals: FKM; Hardware: Stainless Steel (1.4401)

Seal degradation from high-temperature drilling environments; valve seat wear from frequent actuation; internal corrosion from chemical drilling fluids

Monitor operating temperature—do not exceed 180°C (FKM seal limit). For high-cycle applications (≥5 cycles per minute), inspect valve seats quarterly for wear using a borescope. Flush the valve with clean hydraulic fluid after exposure to chemical drilling fluids. Use only OEM-specified replacement seals to ensure fit and performance.

8

4WMM6D50B

Housing: Ductile Iron (GGG50); Spool: Stainless Steel (1.4404); Seals: FKM; Hardware: Stainless Steel (1.4401)

Seal degradation from high-temperature drilling environments; valve seat wear from frequent actuation; internal corrosion from chemical drilling fluids

Monitor operating temperature—do not exceed 180°C (FKM seal limit). For high-cycle applications (≥5 cycles per minute), inspect valve seats quarterly for wear using a borescope. Flush the valve with clean hydraulic fluid after exposure to chemical drilling fluids. Use only OEM-specified replacement seals to ensure fit and performance.

9

4WMM16M50B

Housing: Forged Steel (A105); Spool: Heat-Treated Stainless Steel; Seals: PTFE; Hardware: High-Tensile Steel (12.9 grade)

PTFE seal wear from abrasive contaminants; valve body fatigue from vibration; spool misalignment from improper mounting

Install vibration dampeners if the valve is mounted near mud pumps or other high-vibration equipment. Ensure mounting surface is flat (tolerance ≤0.1mm) to prevent spool misalignment. Replace inline filters every 300 operating hours in dusty or sandy environments. Inspect PTFE seals annually—replace if signs of fraying or wear are present.

10

H-4WMM25D50B/F

Housing: Alloy Steel (42CrMo); Spool: Chrome-Plated Alloy Steel; Seals: FKM/PU Composite; Hardware: Alloy Steel (10.9 grade)

Composite seal delamination from pressure spikes; valve stem wear from cyclic loading; housing corrosion from offshore salt spray

Install a pressure accumulator upstream to absorb pressure spikes (max spike ≤45MPa). Lubricate valve stem with high-temperature grease (NLGI Grade 2) every 6 months. For offshore installations, apply a marine-grade anti-corrosion coating to the housing and hardware quarterly. Torque check mounting bolts monthly to prevent vibration loosening.

11

4WH6A50/B

Housing: Ductile Iron (GGG40); Spool: Stainless Steel (1.4301); Seals: NBR; Hardware: Alloy Steel (8.8 grade)

NBR seal swelling from exposure to synthetic drilling fluids; spool galling from low-lubricity hydraulic fluid; valve seat leakage from debris buildup

Verify seal compatibility with fluid type (NBR not suitable for synthetic fluids—replace with FKM seals if needed). Use hydraulic fluid with minimum viscosity of 15 cSt at operating temperature to ensure adequate lubrication. Flush the valve annually to remove debris buildup. Inspect for leakage using a pressure test (1.5x operating pressure) every 6 months.

1

DG17V-3-2N-60

Housing: Forged Steel (A105); Poppet: Stainless Steel (1.4404); Spring: Chrome-Silicon Steel; Seals: FKM

Poppet sticking from contamination; spring fatigue from cyclic pressure fluctuations; seal wear from high-pressure fluid flow

Calibrate the valve every 6 months using a dead-weight tester to ensure pressure accuracy (tolerance ±1%). Maintain hydraulic fluid cleanliness to ISO 4406 Class 15/12/9. Inspect the spring for fatigue annually—replace if deformation or loss of tension is detected. Avoid sudden pressure changes exceeding 10MPa per second to reduce spring stress.

1

LT07MKA-2X/100/02M

Housing: Alloy Steel (4140); Spool: Stainless Steel (1.4401); Seals: FKM; Solenoid Coil: Copper Wire with Epoxy Encapsulation (IP67); Hardware: Stainless Steel (1.4401)

Solenoid coil burnout from voltage fluctuations; spool sticking from contamination; seal wear from high-frequency actuation

Install a voltage stabilizer to maintain 24VDC ±5% for the solenoid coil. Maintain hydraulic fluid cleanliness to ISO 4406 Class 16/13/10. Inspect coil insulation resistance annually (minimum 100MΩ at 500V DC). For high-frequency applications (≥10 cycles per minute), lubricate the spool with PTFE-based grease every 3 months. Check seal integrity quarterly using a leak test (2MPa nitrogen).

2

DHA-0631/2/7-M-24DC

Housing: Ductile Iron (GGG50); Spool: Chrome-Plated Steel; Seals: NBR; Solenoid Coil: Copper Wire with Polyurethane Encapsulation (IP65); Hardware: Alloy Steel (8.8 grade)

NBR seal degradation from high temperature; solenoid armature sticking from moisture; valve body corrosion from saltwater exposure

Monitor operating temperature—do not exceed 120°C (NBR seal limit). Protect the solenoid from moisture ingress using a waterproof connector. For offshore use, apply anti-corrosion coating to the valve housing every 6 months. Test solenoid operation monthly by activating the valve manually and checking for smooth actuation. Replace seals annually in high-temperature environments.

3

DHA-0631/2-PA-M/7

Housing: Forged Steel (A105); Spool: Stainless Steel (1.4404); Seals: PTFE; Solenoid Coil: Copper Wire with Epoxy Encapsulation (IP67); Hardware: High-Tensile Steel (10.9 grade)

PTFE seal wear from abrasive contaminants; solenoid coil damage from mechanical impact; spool wear from cyclic loading

Install a 5μm inline filter upstream to remove abrasive particles. Mount the valve in a protected location to prevent mechanical impact on the solenoid. Inspect spool wear annually using a micrometer—replace if wear exceeds 0.1mm. Check solenoid coil temperature during operation—do not exceed 80°C to prevent insulation damage.

4

RZGA-A-010/100/PA-M/7

Housing: Alloy Steel (42CrMo); Spool: Heat-Treated Stainless Steel; Seals: FKM/PTFE Composite; Solenoid Coil: Copper Wire with Silicone Encapsulation (IP68); Hardware: Stainless Steel (1.4401)

Composite seal delamination from pressure spikes; solenoid armature corrosion from H2S exposure; valve body fatigue from vibration

Install a pressure relief valve upstream to limit pressure spikes to ≤1.2x operating pressure. For sour service (H2S >50ppm), verify compliance with NACE MR0175/ISO 15156. Mount the valve on a vibration-damping bracket if installed near high-vibration equipment. Inspect the solenoid armature for corrosion annually—replace if pitting is detected.

5

DRE6-1X/50MG24K4M

Housing: Cast Steel (WCB); Spool: Chrome-Plated Alloy Steel; Seals: FKM; Solenoid Coil: Copper Wire with Epoxy Encapsulation (IP67); Hardware: Alloy Steel (10.9 grade)

Solenoid coil burnout from reverse polarity; spool sticking from low-temperature fluid viscosity; seal extrusion under high pressure

Ensure correct polarity when wiring the solenoid (24VDC). Maintain hydraulic fluid temperature above -20°C to prevent excessive viscosity—use a fluid heater if necessary. Install a back-up ring upstream of the seal to prevent extrusion in high-pressure applications (≥30MPa). Test solenoid polarity and operation before installation. Inspect seals quarterly for signs of extrusion.

6

DHA-0631/2/PA-M-24DC

Housing: Ductile Iron (GGG50); Spool: Stainless Steel (1.4301); Seals: NBR; Solenoid Coil: Copper Wire with Polyurethane Encapsulation (IP65); Hardware: Alloy Steel (8.8 grade)

NBR seal swelling from exposure to mineral oil-based fluids; solenoid armature sticking from debris; valve seat wear from frequent actuation

Verify seal compatibility with hydraulic fluid type. Flush the valve every 6 months to remove debris buildup. Inspect the solenoid armature for debris annually—clean with a soft brush if needed. For high-cycle applications (≥5 cycles per minute), inspect valve seats quarterly for wear using a borescope. Replace seals every 12 months.

7

RZGAA/M-A-010/100/PA-M

Housing: Alloy Steel (4140); Spool: Heat-Treated Stainless Steel; Seals: FKM; Solenoid Coil: Copper Wire with Silicone Encapsulation (IP68); Hardware: Stainless Steel (1.4401)

Solenoid coil damage from submergence; spool corrosion from saltwater; seal wear from high-pressure fluid flow

Ensure the solenoid is properly sealed (IP68) for submersible applications. For offshore use, rinse the valve with fresh water after exposure to saltwater to prevent corrosion. Inspect the spool for corrosion annually—apply anti-corrosion grease if needed. Replace seals every 12 months in high-pressure applications (≥30MPa). Test solenoid operation monthly.

8

E-ME-AC-01F-/A1+E-K-32M

Housing: Forged Steel (A105); Spool: Stainless Steel (1.4404); Seals: PTFE; Solenoid Coil: Copper Wire with Epoxy Encapsulation (IP67); Hardware: High-Tensile Steel (12.9 grade)

PTFE seal wear from abrasive contaminants; solenoid coil overheating from continuous operation; valve body fatigue from pressure cycles

Install a 10μm inline filter upstream to remove abrasive particles. Limit continuous solenoid operation to ≤8 hours—use a timer or interlock to prevent overheating. Inspect the valve body for fatigue cracks annually using magnetic particle inspection (MPI). Calibrate the proportional control function every 6 months to ensure accuracy (tolerance ±2%).

1

CGYL-201

Cylinder Barrel: Alloy Steel (42CrMo); Piston Rod: Chrome-Plated Alloy Steel (Hardness HRC 55-60); Piston: Ductile Iron (GGG50); Seals: FKM/PU Composite; Hardware: High-Tensile Steel (10.9 grade)

Rod bending from side loads; Seal leakage from rod surface damage; Barrel corrosion from saltwater exposure

Ensure the cylinder is mounted to absorb side loads (use spherical bearings if necessary). Inspect the rod surface for scratches or dents monthly—polish minor damage with a fine abrasive pad. For offshore use, apply anti-corrosion coating to the barrel and rod every 3 months. Replace seals every 12 months or if leakage is detected. Torque mounting bolts to OEM specifications (35-40 N·m).

1

PT-3

Wetted Parts: Stainless Steel (1.4404); Housing: Aluminum Alloy (6061-T6) with Epoxy Coating; Sensing Element: Piezoresistive Silicon; Electrical Connector: IP67

Sensing element damage from overpressure; Housing corrosion from saltwater; Electrical connector failure from moisture ingress

Install a pressure relief valve upstream to prevent overpressure (max pressure ≤1.5x sensor range). For offshore use, inspect the housing coating quarterly for damage—touch up with epoxy paint if needed. Use waterproof connectors and sealants to prevent moisture ingress. Calibrate the sensor every 6 months using a dead-weight tester to ensure accuracy. Avoid mechanical impact on the sensor housing.

2

HFH2-P1-3-P-2000

Wetted Parts: Hastelloy C-276 (for sour service); Housing: Stainless Steel (1.4401); Sensing Element: Capacitive; Electrical Connector: IP68

Sensing element fouling from drilling fluid deposits; Housing corrosion from H2S exposure; Electrical failure from vibration

Flush the sensor port monthly with clean solvent to remove drilling fluid deposits. Verify compliance with NACE MR0175/ISO 15156 for sour service applications. Mount the sensor on a vibration-damping bracket to reduce electrical component fatigue. Inspect the electrical connector for corrosion annually—clean with a dry brush if needed. Calibrate the sensor every 12 months.

3

HFH2-P1-3-P-1500

Wetted Parts: Stainless Steel (1.4404); Housing: Aluminum Alloy (6061-T6) with Anti-Corrosion Coating; Sensing Element: Piezoresistive Silicon; Electrical Connector: IP67

Sensing element damage from pressure spikes; Housing corrosion from chemical drilling fluids; Electrical short from moisture

Install a pressure accumulator upstream to absorb pressure spikes. Flush the sensor with fresh water after exposure to chemical drilling fluids. Use a moisture barrier in the electrical cable to prevent water ingress. Calibrate the sensor every 6 months. Inspect the wetted parts for corrosion annually—replace if pitting is detected.

1

MFH-3 1/4"  MSFG-24DC-M-EX

Housing: Aluminum Alloy (6061-T6) with Epoxy Coating; Valve Seat: NBR; Solenoid Coil: Copper Wire with Epoxy Encapsulation (EX II 2G Ex d IIC T6); Hardware: Stainless Steel (1.4401)

Solenoid coil damage from explosion-proof housing breach; Valve seat wear from contaminated compressed air; Housing corrosion from saltwater exposure

Inspect the explosion-proof housing annually for cracks or damage—replace if breached. Maintain compressed air cleanliness to ISO 8573-1 Class 4/4/1 (particulate/water/oil). For offshore use, apply anti-corrosion coating to the housing every 3 months. Test solenoid operation monthly in a safe environment. Replace valve seats every 12 months or if leakage is detected.

1

NPT3/4

Body: Carbon Steel (A105) with Zinc Plating; Threads: Precision-Machined Tapered NPT; Sealant: PTFE-Based Thread Sealant (Compatible with Hydraulic/Pneumatic Fluids)

Thread damage during installation; Zinc plating corrosion from saltwater; Sealant degradation from high temperature

Use a pipe thread gauge to verify thread quality before installation. Tighten the fitting to the recommended torque (25-30 N·m) using a calibrated torque wrench—do not over-tighten. For offshore use, apply a marine-grade anti-corrosion coating over the zinc plating. Use high-temperature PTFE sealant if operating temperature exceeds 150°C. Inspect fittings for leaks after installation using a soap solution.