BPMF BOP Control System (Surface Mounted) Parts

1

Air treatment

Aluminum alloy housing, stainless steel filter element

1. Filter clogging from oil/water in compressed air; 2. Seal degradation by corrosive gases.

1. Drain condensed water daily; 2. Replace filter element every 500 operating hours; 3. Avoid direct exposure to salt spray in offshore settings.

2

Air pressure regulator (distribution valve)

Brass valve core, aluminum alloy body

1. Internal erosion from high-pressure air impurities; 2. Diaphragm fatigue due to frequent pressure adjustments.

1. Install a pre-filter upstream; 2. Avoid sudden pressure spikes exceeding rated value; 3. Lubricate internal components quarterly with food-grade oil.

3

Air filtering and reducing valve

Stainless steel filter, nitrile rubber seal

1. Seal hardening in extreme temperatures (-20℃< or >60℃); 2. Valve seat wear from particulate impact.

1. Insulate in low-temperature environments; 2. Clean filter bowl weekly; 3. Calibrate pressure reducing accuracy monthly per API 16D.

4

Air treatment

Aluminum alloy housing, polyester filter element

1. Filter element damage from high-pressure air surges; 2. Corrosion of housing in coastal oilfields.

1. Install a surge arrester upstream; 2. Apply anti-corrosion coating to housing annually; 3. Replace seals if air leakage is detected.

1

Air shut-off valve

Carbon steel body, stainless steel ball

1. Valve seat erosion by abrasive particles; 2. Stem seal wear from frequent opening/closing.

1. Operate valves smoothly (avoid forced twisting); 2. Lubricate stem with high-temperature grease quarterly; 3. Inspect for leakage using pressure decay test monthly.

2

Straight check valve

Stainless steel 316 body, fluororubber seal

1. Disc wear from reverse flow impact; 2. Seal degradation by chemical drilling fluids.

1. Ensure flow direction matches valve marking; 2. Clean valve internals after contact with corrosive fluids; 3. Replace disc if check function fails (per API 16D Clause 5.7).

3

3-way valve

Brass body, stainless steel spool

1. Spool jamming from internal contamination; 2. Seal damage from extreme pressure cycles.

1. Flush valve before installation; 2. Avoid exceeding rated pressure (21MPa); 3. Cycle valve monthly to prevent spool seizing.

4

4-way valve

Aluminum alloy body, nitrile rubber seal

1. Seal aging in high-humidity environments; 2. Spool wear from misalignment during actuation.

1. Keep valve housing dry; 2. Align actuator correctly during installation; 3. Replace seals annually as preventive maintenance.

5

4-way air operated valve

Cast iron body, stainless steel actuator

1. Actuator diaphragm damage from air pressure spikes; 2. Valve seat wear from frequent switching.

1. Install a pressure relief valve upstream; 2. Adjust actuation speed to avoid impact; 3. Inspect diaphragm for cracks every 300 operating hours.

6

4-way air operated valve

Cast iron body, stainless steel actuator

1. Same as above; 2. Internal corrosion from moisture in compressed air.

1. Same as above; 2. Install air dryer to maintain dew point ≤-40℃; 3. Drain actuator housing weekly.

7

4-way air operated valve

Cast iron body, stainless steel actuator

1. Same as above; 2. Electrical connector damage from vibration.

1. Same as above; 2. Secure connector with anti-vibration fasteners; 3. Inspect wiring for abrasion monthly.

8

Ball valve

Carbon steel body, stainless steel ball

1. Ball surface scratches from particulate matter; 2. Seal compression deformation from over-tightening.

1. Filter fluid/air before valve; 2. Tighten valve handle to recommended torque (15-20 N·m); 3. Polish ball surface with fine abrasive if scratched lightly.

9

Ball valve

Carbon steel body, stainless steel ball

1. Same as above; 2. Body corrosion in sour service environments (H₂S).

1. Same as above; 2. Use H₂S-resistant coating (per NACE MR0175); 3. Inspect body for pitting every 6 months.

10

High-pressure ball valve

Stainless steel 316 body, tungsten carbide ball

1. Valve seat damage from high-pressure impact; 2. Stem wear from thermal expansion.

1. Operate valve only when system pressure is ≤50% of rated value; 2. Compensate stem clearance in high-temperature (＞80℃) conditions; 3. Test valve integrity annually via hydrostatic test (API 16D Clause 8.3).

11

High-pressure ball valve

Stainless steel 316 body, tungsten carbide ball

1. Same as above; 2. Seal leakage due to thermal cycling.

1. Same as above; 2. Avoid rapid temperature changes (≤5℃/min); 3. Re-torque stem packing after thermal cycles.

12

Suction shut-off valve

Carbon steel body, rubber-lined disc

1. Disc lining wear from fluid turbulence; 2. Valve body corrosion from low pH fluids.

1. Ensure smooth fluid flow (avoid sharp bends upstream); 2. Neutralize fluid pH before passing through; 3. Inspect lining for cracks every 400 operating hours.

13

Air/manual operate regulating valve

Brass body, stainless steel stem

1. Manual handle wear from frequent use; 2. Internal leakage due to seal aging.

1. Operate handle with uniform force; 2. Replace seals every 6 months; 3. Calibrate regulating accuracy quarterly using a precision pressure gauge.

1

Hydro-pneumatic pressure switch

Aluminum alloy housing, brass sensing element

1. Sensing element fatigue from frequent pressure cycles; 2. Electrical contact corrosion in humid environments.

1. Set pressure range within rated limits; 2. Seal electrical connector with waterproof tape; 3. Test switch response time monthly (target: ≤0.1s).

2

Vibration-proof pressure gauge

Stainless steel case, glass lens, copper tube

1. Lens breakage from mechanical impact; 2. Internal mechanism damage from high-frequency vibration.

1. Install a vibration damper adapter; 2. Protect gauge with a shockproof cover; 3. Calibrate annually per ISO 4064.

3

Relief valve

Carbon steel body, stainless steel poppet

1. Poppet wear from debris in fluid; 2. Spring fatigue from prolonged overpressure.

1. Install a strainer upstream; 2. Avoid continuous operation at ＞90% of set pressure; 3. Test relief function quarterly (API 16D Clause 7.4).

4

Air-operated pressure transducer

Stainless steel sensing head, aluminum alloy housing

1. Sensing head corrosion from chemical fluids; 2. Signal drift due to temperature fluctuations.

1. Use chemical-resistant coating for sour service; 2. Install in temperature-stable area (0-60℃); 3. Calibrate signal output monthly with a digital multimeter.

5

Pressure reducing and regulating valve

Brass body, stainless steel diaphragm

1. Diaphragm damage from pressure spikes; 2. Valve seat wear from particulate erosion.

1. Install a surge protector upstream; 2. Clean valve internals every 500 operating hours; 3. Adjust pressure incrementally (avoid sudden changes).

6

Pressure gauge

Steel case, glass lens, brass tube

1. Internal leakage from seal degradation; 2. Scale buildup on dial from oil contamination.

1. Replace seals annually; 2. Wipe dial with a degreaser monthly; 3. Replace gauge if pointer fails to return to zero.

7

YTK series pressure switch

Engineering plastic housing, stainless steel sensing rod

1. Sensing rod bending from mechanical impact; 2. Contact failure from dust accumulation.

1. Protect sensing rod with a guard; 2. Clean housing interior quarterly; 3. Test contact continuity every month.

8

Air-operated pressure transducer

Stainless steel sensing head, aluminum alloy housing

1. Same as above; 2. Connector loosening from vibration.

1. Same as above; 2. Use lock washers for connectors; 3. Inspect wiring harness for tightness monthly.

9

Pressure gauge

Steel case, glass lens, brass tube

1. Same as above; 2. Tube rupture from overpressure.

1. Same as above; 2. Ensure gauge range is 1.5x system maximum pressure; 3. Replace if tube shows signs of bulging.

10

Vibration-proof pressure gauge

Stainless steel case, glass lens, copper tube

1. Same as above; 2. Fluid leakage from tube fitting.

1. Same as above; 2. Tighten tube fitting to recommended torque; 3. Inspect for leakage weekly using soapy water.

11

Relief valve

Carbon steel body, stainless steel poppet

1. Same as above; 2. Poppet sticking from scale buildup.

1. Same as above; 2. Flush valve with clean fluid quarterly; 3. Cycle valve manually monthly to prevent sticking.

1

Air pump

Cast iron body, aluminum alloy piston

1. Piston ring wear from insufficient lubrication; 2. Cylinder scoring from abrasive particles.

1. Use recommended lubricating oil (ISO VG 32); 2. Install an air filter with 5μm precision; 3. Check oil level daily and replace oil every 2000 operating hours.

2

Explosion proof electric motor

Cast iron housing, copper winding

1. Winding insulation degradation from overheating; 2. Bearing wear from vibration.

1. Ensure proper ventilation (avoid blocking air vents); 2. Lubricate bearings every 1500 operating hours; 3. Test insulation resistance annually (minimum 2MΩ at 500V DC).

3

Triplex pump

Stainless steel 304 fluid end, carbon steel power end

1. Plunger wear from high-pressure fluid; 2. Valve seat damage from cavitation.

1. Maintain fluid viscosity at 10-20 cSt; 2. Avoid cavitation by keeping suction pressure ≥0.2MPa; 3. Replace plunger seals every 800 operating hours.

1

Fluid strainer

Stainless steel 316 mesh, aluminum alloy housing

1. Mesh clogging from dirt and metal particles; 2. Housing corrosion from chemical fluids.

1. Clean mesh every 200 operating hours; 2. Use corrosion-resistant coating for harsh fluids; 3. Replace mesh if holes are detected.

2

Suction strainer

Polyester mesh, plastic housing

1. Mesh damage from large debris; 2. Housing cracking from vacuum pressure.

1. Install a debris guard upstream; 2. Avoid excessive vacuum (≤0.08MPa); 3. Inspect mesh for damage during each maintenance cycle.

1

NXQ/model bladder accumulator

Carbon steel shell, nitrile rubber bladder

1. Bladder rupture from over-pressurization; 2. Shell corrosion from external moisture.

1. Set pre-charge pressure per manufacturer’s specs; 2. Paint shell annually with anti-corrosion paint; 3. Inspect bladder for leaks every 6 months (hydrostatic test per ASME BPVC).

2

Double acting cylinder

Stainless steel 304 rod, aluminum alloy barrel

1. Rod surface corrosion from salt spray; 2. Seal wear from lateral loads.

1. Apply anti-rust oil to rod daily; 2. Ensure alignment to avoid lateral loads; 3. Replace seals every 1000 operating hours.

3

Double acting cylinder

Stainless steel 304 rod, aluminum alloy barrel

1. Same as above; 2. Barrel scoring from contaminated fluid.

1. Same as above; 2. Use filtered fluid (10μm precision); 3. Flush cylinder if fluid contamination is detected.

3802000060

4403000050

4807100030

5126990080

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3802000281

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4401000010

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24401000040

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9162300000

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9162500000

9162900000

4401000030

4403000020

9160900000

3802000270

3101030040

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3808000030

4403000040

9161200000

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9163000000

9163200000

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9160800000

5126990100

9162000000

9162200000

3802000080

4401000040

3101030010

3802000070

4401000050

3802000340

9163100000

4807100010

What is the key standard for BPMF BOP control system parts?

All parts must comply with API 16D (Specification for Control Systems for Blowout Preventers) and ISO 13628-4 (Subsea Production Systems—Drilling and Well Completion Equipment). For explosion-proof components, ATEX 94/9/EC certification is mandatory for hazardous zones (Zone 1/2).

How to extend the lifespan of YTK series pressure switches?

Avoid mechanical impact on the sensing rod by installing a guard; clean dust from the housing quarterly to prevent contact failure; calibrate contact response monthly. For humid environments, seal the electrical connector with waterproof tape to prevent corrosion.

Can high-pressure ball valves be used in sour service (H₂S) environments?

Yes, but ensure the valve body uses stainless steel 316 or Inconel material, and apply H₂S-resistant coating per NACE MR0175. Inspect the valve body for pitting every 6 months, and replace seals with fluororubber variants to resist chemical corrosion.