control component

Technical Specifications – Control Elements at a Glance

Parameter	Plug Valves	Choke Valves	Gate Valves	Check Valves	Relief Valves
Pressure Rating	21–140 MPa	35–140 MPa	35–105 MPa	21–105 MPa	21–105 MPa
Size Range	2″–5″	2″–3″	2-1/16″–5-1/8″	2″–5″	1″–2″
Temperature	-46°C to +180°C	-29°C to +121°C	-46°C to +121°C	-29°C to +121°C	-29°C to +121°C
Material (Body)	AISI 4130/4140, 17-4PH, Inconel	AISI 4130 with carbide trim	AISI 4130, stainless steel	AISI 4130, ductile iron	AISI 4130, stainless steel
End Connections	Fig 1502/2002, API flanges, threaded	Fig 1502/2002	API flanges	Fig 1502/2002, threaded, flanged	NPT, flanged, union
API Monogram	6A, 16C	6A, 16C	6A	6A	6A
Sour Service	NACE MR0175 (optional)	NACE MR0175 (standard for carbide trim)	NACE MR0175	NACE MR0175	NACE MR0175

Key Technical Advantages – Why SJ Control Elements Perform Better

1. API 6A & 16C Certified – With Full Traceability

Every control element we manufacture carries the API monogram where applicable. We maintain API 6A (wellhead equipment) and API 16C (choke and kill manifolds) certifications. More importantly, every component has a traceable serial number linked to:

• Raw material mill certificate (heat number)

• In-process inspection records (dimensional, NDE)

• Pressure test results (1.5x working pressure)

• Final assembly records

When your quality inspector asks for documentation, we provide a complete package – not a summary sheet.

2. Interchangeable with Industry-Standard Components

SJ control elements are designed to be drop-in replacements for major international brands. Our plug valves use standard bore sizes and face-to-face dimensions. Our choke valves have interchangeable trim components. Our gate valves bolt up to API 6A flanges with standard stud patterns.

This means you’re not locked into SJ for spares. But if you do choose us, you’ll find the fit and function identical to what you’re used to.

3. Material Options for Any Service Condition

Standard components use AISI 4130/4140 alloy steel, normalized and tempered for high strength and toughness. But we regularly build to special requirements:

Service Condition	Material Solution
Sour service (H₂S)	NACE MR0175 compliance – hardness controlled, 17-4PH or Inconel trim
High temperature (180°C+)	High-temp seals (Viton, Kalrez), special stem packing, body material with creep resistance
Low temperature (-46°C)	Impact-tested materials at -46°C, low-temp lubricants, special seal materials
Abrasive fluids (sand-laden frac)	Tungsten carbide seats and plugs, hard-faced sealing surfaces
Corrosive fluids (CO₂, brine)	316L stainless steel, duplex stainless steel, Inconel wetted parts

4. Advanced Sealing Technology

SJ control elements use a combination of metal-to-metal primary seals with elastomeric or thermoplastic backup seals. This provides:

• Metal-to-metal seal: Survives fire, high temperature, and erosion

• Soft seal: Zero leakage at low differential pressure, extends service life

• Pressure-energized design: Higher pressure = tighter seal

Our plug valves feature lubricated or non-lubricated designs. For high-cycle applications, we recommend non-lubricated (sleeved) plug valves with PTFE sleeves.

5. Rugged Construction for High Cycle Life

Control elements on fracturing spreads and drilling rigs cycle thousands of times per year. SJ designs for durability:

• Plug valves: Hard chrome or tungsten carbide coated plugs, replaceable seats

• Choke valves: Tungsten carbide needle and seat – tested to 500 hours of abrasive sand slurry

• Gate valves: Full bore, floating seats, rising or non-rising stem

• Check valves: Piston or swing design with replaceable seals

We publish cycle life data. Ask for our endurance test reports.

6. Remote Operation Ready

All SJ control elements can be fitted with actuators for remote or automated control. We supply complete actuation packages including:

• Hydraulic, pneumatic, or electric actuators

• Solenoid valves for on/off control (24V DC, 110V AC)

• Position indicators (limit switches, 4‑20 mA transmitters)

• Manual overrides (handwheels or levers) for failsafe operation

• Pilot control panels for choke valves

Applications – Where SJ Control Elements Are Used

Application	Control Elements Used	Typical Configuration
Drilling Operations	Plug valves, gate valves, check valves, choke valves	Mud manifold, standpipe manifold, choke manifold
Well Control (Kicks & Kill)	Choke valves, gate valves, safety relief valves	Choke & kill manifold with remote hydraulic choke
Cementing	Plug valves, check valves, safety valves	Cementing manifold, cement head control valves
Fracturing & Stimulation	Plug valves, check valves, choke valves, hydraulic actuators	Zipper frac manifold, pump discharge headers, sand control valves
Production Wellhead	Gate valves, check valves, safety relief valves	Wing valves, master valves, flowline chokes
BOP Control	Directional control valves, pressure regulators, relief valves	BOP control manifold, accumulator release valves
Well Testing	Choke valves, plug valves, check valves	Flowhead, test manifold, burner boom valves
Coiled Tubing	Check valves, plug valves, relief valves	Coiled tubing injector head valves, downhole check valves
Snubbing	Gate valves, check valves, plug valves	Snubbing BOP manifold, stripper head valves

Real-World Installations

• Bohai Bay, China: SJ plug valves and choke valves on 12 fixed platform workover rigs – average 2,000 operating cycles per valve per year with <1% failure rate

• Kuwait: Choke valves and gate valves on ZJ90DB drilling rigs – desert operation, 50°C+ ambient

• South China Sea: Remote hydraulic choke valves on deepwater drilling riser systems

• Africa (Fracturing Spreads): SJ plug valves and check valves on 5,000 HP fracturing fleets – 140 MPa operating pressure

OEM & Customized Solutions – Built to Your Specification

Control elements are not commodities. Your operation may have unique pressure requirements, connection types, actuation needs, or material constraints. SJ treats every control element order as an opportunity to customize.

What we customize:

Your Requirement	Our Solution
Non-standard pressure rating	Components from 21 MPa to 175 MPa (25,000 psi) – we'll build to your exact spec
Special end connections	Any transition – hammer union to API flange, threaded to welded, metric to imperial, custom thread forms
Unique trim material	Tungsten carbide, Stellite, ceramic, stainless steel – for abrasive or corrosive fluids
Sour service (H₂S)	NACE MR0175 / ISO 15156 – full hardness control, non-ferrous trim, special elastomers
High temperature (thermal recovery)	High-temp seals, special stem packing, elevated temperature pressure rating
Arctic service (-46°C)	Impact-tested materials, low-temp lubricants, special seals and elastomers
Space-constrained mounting	Compact valve designs, right-angle actuation, reduced face-to-face dimensions
Custom actuator interface	Mounting brackets, coupling dimensions, control interfaces – match your existing actuators
Special marking & documentation	Your logo, serial numbers, custom data plates – full documentation package as required

Our control element manufacturing process:

Step 1 – Specification: You provide pressure, size, material, end connections, actuation type, and any special requirements.

Step 2 – Engineering: Our valve engineering team produces detailed drawings and bill of materials.

Step 3 – Material procurement: Certified materials with mill traceability.

Step 4 – Manufacturing: Machining, heat treatment, surface finishing, and assembly on dedicated valve production lines.

Step 5 – Testing: Each control element pressure tested to 1.5x working pressure. Additional tests per your request (fire test, fugitive emissions, cycle test).

Step 6 – Certification: API monogram applied where applicable. Full documentation package delivered.

Step 7 – Delivery: Individual packaging with protection for thread and sealing surfaces.

Why Choose SJ Petroleum Machinery for Control Elements?

Reason	What You Actually Gain
Sinopec Group ownership	Core equipment manufacturing enterprise of China Petrochemical Corporation. Founded 1941, 2,000+ employees, 663,000 m² campus. We own the foundries, machine shops, and test bays.
Full API certification	API 6A, 16C, plus 4F, 7K, 8C. First Chinese manufacturer to obtain API 16D license.
168+ control element types	Plug valves, gate valves, check valves, choke valves, relief valves, actuators – one supplier for your entire control element needs.
Complete traceability	From heat number to pressure test record – every component tracked. Your inspector can audit our records.
Annual capacity	150,000 high pressure manifolds and control elements – we have the production volume to meet large orders.
In-house actuation	We manufacture hydraulic, pneumatic, and electric actuators – not third-party add-ons. Single-source control packages.
Global field support	24/7 technical support. Spares stocked in Houston, Dubai, and Singapore. Field service engineers available for offshore and remote sites.
Third-party inspection ready	DNV, ABS, Lloyd's, CCS, or your own inspector – welcome at any stage.

Frequently Asked Questions (FAQ)

Q1: What is the difference between a "fluid control product” and a "control element”?

A: A "fluid control product” is a broad term covering any component that manages fluid – manifolds, pumps, fittings, and valves. A "control element” specifically refers to the component that performs the active control function: opening, closing, restricting, or relieving flow. Valves, chokes, and relief valves are control elements. Piping, manifolds, and unions are not.

Q2: What API certifications do your control elements carry?

A: Plug valves, gate valves, check valves, and choke valves are API 6A and 16C certified. Relief valves are API 6A certified. We can supply API monogram certification documentation with every order.

Q3: Are your valves interchangeable with [brand name]?

A: Yes – SJ control elements are designed for dimensional and functional interchangeability with leading international brands. Our hammer union ends match industry-standard Fig. 602/1002/1502/2002. Our API flanges conform to API 6A. Our actuation interfaces are standard ISO 5211 or customer-specific.

Q4: What pressure ratings are available?

A: Standard control elements range from 21 MPa (3,000 psi) to 140 MPa (20,000 psi). For specialized applications, we manufacture up to 175 MPa (25,000 psi). Contact us for ratings beyond 140 MPa.

Q5: Can you supply control elements for sour service (H₂S)?

A: Yes – we manufacture NACE MR0175 / ISO 15156 compliant control elements. All wetted parts undergo hardness testing (≤22 HRC for carbon steel). We use corrosion-resistant alloys for trim (17-4PH, Inconel, Monel) as required.

Q6: What is the typical lead time for control elements?

A: Standard stock items (common sizes, materials, pressure ratings): 2–4 weeks. Engineered-to-order (custom materials, non-standard sizes, sour service): 8–12 weeks. Large quantities (100+ units): 12–16 weeks.

Q7: Do you provide actuators and control systems?

A: Yes – we manufacture hydraulic, pneumatic, and electric actuators. We also supply complete control panels for BOP systems, choke & kill manifolds, and fracturing spreads – including solenoid valves, pressure regulators, and position feedback.

Q8: What documentation do you provide?

A: Standard package includes: material test reports (mill certificates), dimensional inspection report, NDE report (MT, UT, PT as applicable), pressure test certificate (1.5x working pressure), API monogram certificate. Additional documentation (third-party witness reports, NACE compliance, fire test certificates) available on request.

Q9: Can I get a sample for testing?

A: Yes – we can supply sample control elements (plug valve, check valve, or choke valve) for testing and qualification. Sample orders typically 2–4 units. Contact our sales team for sample pricing and lead time.

Q10: How do I get a quote?

A: Email control@sjpetro.com with:

• Control element type (plug valve, choke valve, gate valve, check valve, relief valve)

• Pressure rating required (MPa or psi)

• Size (nominal bore / connection size)

• End connection type (hammer union Fig. ___, API flange size, threaded NPT, etc.)

• Material requirements (standard, sour service, high temp, etc.)

• Actuation requirement (manual, hydraulic, pneumatic, electric)

• Quantity needed

We'll respond within 3–5 working days with a technical data sheet and budget quote.

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