Forged Check Valve 900LBS - 1500LBS - 2500LBS (RJ Bonnet)

CAST VALVE SERIES

 GATE VALVE

 GLOBE VALVE

 CHECK VALVE

 BALL VALVE

 BUTTERFLY VALVE

FORGED VALVE SERIES

 FORGED GATE VALVE

 FORGED GLOBE VALVE

 FORGED CHECK VALVE

INDUSTRIAL STRAINER SERIES

 Y TYPE STRAINER

 BASKET STRAINER

 T TYPE STRAINER

 TEMPORARY STRAINER

 FORGED STRAINER

 STRAINER SCREEN & BASKET

LATEST PRODUCTS

API 602 Forged Check Valve 900LBS - 1500LBS - 2500LBS - RJ Bonnet, SW NPT Ends

Tengs Valve supplies high-quality RJ Gasket Bolted Bonnet Forged Check Valves for ANSI Class 900LBS, 1500LBS and 2500LBS, manufactured to BS 5352 and API 602 standards. Available with Butt Weld (BW), Socket Weld (SW), and Threaded (NPT/Screwed) ends, sizes from NPS 1/2″ to NPS 2″ with Full Port or Reduced Port options. Valve types include Ball, Swing, and Piston Type. Body materials include forged carbon steel (A105, LF2), alloy steel (F5, F11, F22), stainless steel (F304, F316), and duplex steel (F51, F53). The RJ Gasket Bolted Bonnet design provides superior sealing integrity for Class 900 and above high-pressure service. Ideal for high-pressure oil & gas, petrochemical, and power generation applications.

Specification For Forged Check Valve 900LBS - 1500LBS - 2500LBS (RJ Bonnet)

• Design & Manufacture: BS 5352, API 602, ASME B16.34

• Constructions: RJ Gasket Bolted Bonnet

• Bore Type: Full Bore (FB), Reduced Bore (RB)

• Valve Type: Ball, Swing, Piston Type

• Size Range: 1/2″ to 2″ (NPS 1/2 to NPS 2)

• Pressure Ratings: ANSI 900LB, 1500LB, 2500LB

• End Connections: Butt Weld (BW), Socket Weld (SW), NPT (Screwed)

• Body Materials: A105, LF2, F5, F11, F22, F304, F316, F51, F53 or Equivalent

• Trim Materials: Various trim materials available to suit different service conditions

• Seat Type: Hard Seat (Metal Seat)

• Sour Service: NACE MR 0175 on Request

• Test and Inspection: API 598

✓ RJ Gasket Bolted Bonnet — superior sealing integrity for Class 900 and above high-pressure service, with RJ ring gasket fully confined in the machined groove

RJ Gasket Bolted Bonnet vs Pressure Seal Bonnet (PSB) vs Standard Bolted Bonnet (BB)

Parameter	RJ Bolted Bonnet	PSB	Standard BB
Sealing Method	RJ ring gasket in groove + bolts	Internal pressure self-energizing	Flat/spiral gasket + bolts
Leak Tightness	Excellent (metal-to-metal)	Best at high pressure	Good
Maintenance	Easy trim replacement	Depressurize for access	Easy trim replacement
Weight	Heavier (ring groove + bolts)	Heaviest	Lighter
Recommended Class	900–2500	900–2500	150–600
Typical Application	HP wellhead, gas injection	HP steam, subsea	General service

Reference: BS 5352, API 602. RJ Bolted Bonnet combines the maintenance convenience of bolted design with the high-pressure sealing reliability of a metal ring gasket.

Socket Weld (SW) vs Threaded (NPT) vs Butt Weld (BW) Ends

Parameter	SW	NPT	BW
Standard	ANSI B16.11	ANSI B1.20.1	ANSI B16.25
Leak Tightness	Excellent (welded)	Good (sealant required)	Best (full-penetration weld)
Pressure Limit	Full Class 900/1500/2500	Reduced at high temperature	Full Class 900/1500/2500
Installation	Socket weld on site	No welding required	Butt weld on site
Typical Application	Permanent HP installations	Instrument, sampling, temporary	Pipeline, permanent welding

Reference: ANSI B16.11, ANSI B1.20.1, ANSI B16.25. For Class 2500 RJ Bonnet service, SW and BW are recommended over NPT due to the extreme pressure rating.

RJ Bonnet Forged Check Valve 900LBS - 2500LBS Material List

Part Name	Carbon Steel				Alloy Steel			Stainless Steel
	A105	A105	A105	LF2	F5	F11	F22	F304	F316	F51	F53
	Trim 1#	Trim 8#	Trim 5#	Trim 13Cr	Trim 13Cr	Trim 13Cr	Trim 13Cr	—	—	—	—
Body	A105	A105	A105	LF2	F5	F11	F22	F304	F316	F51	F53
Bonnet	A105	A105	A105	LF2	F5	F11	F22	F304	F316	F51	F53
Disc	13Cr	13Cr	STL	13Cr	13Cr	13Cr	13Cr	F304	F316	F51	F53
Seat	13Cr	STL	STL	13Cr	13Cr	13Cr	13Cr	SS304	SS316	STL	STL
Hinge Pin	F6a	F6a	F6a	F6a	F6a	F6a	F6a	F304	F316	F51	F53
Bolts / Nuts	B7 / 2H	B7 / 2H	B7 / 2H	L7 / 4	B16 / 4	B16 / 4	B16 / 4	B8 / 8	B8M / 8M	B8M / 8M	B8M / 8M
RJ Gasket	Soft Iron	Soft Iron	Soft Iron	Soft Iron	Soft Iron	Soft Iron	Soft Iron	SS304	SS316	SS316	SS316

Reference: BS 5352, API 602, ASTM A105, A350, A182. Materials may vary by model and pressure rating. Contact us for confirmed material certificate.

RJ Bonnet Forged Check Valve 900LBS - 1500LBS Dimensions

Reference: BS 5352, ASME B16.11, ANSI B1.20.1, ANSI B16.25. Dimensions may vary by manufacturer. Contact us for confirmed drawing and quotation.

RJ Bonnet Forged Check Valve 2500LBS Dimensions

Reference: BS 5352, ASME B16.11, ANSI B1.20.1, ANSI B16.25. Dimensions may vary by manufacturer. Contact us for confirmed drawing and quotation.

RJ Bonnet Forged Check Valve 900 - 2500 Applications

• Oil and Gas Industry: High-pressure wellhead equipment, Christmas trees, manifold and flowline backflow protection.

• Power Generation: Main steam isolation, boiler drains, turbine bypass lines at Class 900 to 2500.

• Petrochemical: Hydrocracking, hydrotreating, catalytic cracking, reformer units.

• Subsea and Offshore: Subsea manifolds, HIPPS systems, high-pressure process lines.

• Gas Injection and Compression: Natural gas compressor lines, gas injection wells.

• Instrumentation: High-pressure instrument root valves, sensing line isolation.

FAQ - RJ Bonnet Forged Check Valve 900LBS - 1500LBS - 2500LBS

Q1: What is an RJ Gasket Bolted Bonnet design?

A: RJ (Ring Joint) Gasket Bolted Bonnet uses a metal ring gasket seated in a machined groove between the bonnet and body, secured by bolts. When the bolts are tightened, the metal ring is compressed into the groove, creating a metal-to-metal seal that is highly reliable for Class 900 and above high-pressure service. The RJ design combines the maintenance convenience of a bolted bonnet with the superior sealing integrity of a metal ring gasket — ideal for high-pressure oil & gas, wellhead, and gas injection applications.

Q2: Why use RJ Bolted Bonnet instead of PSB for Class 900/1500/2500?

A: RJ Bolted Bonnet and PSB are both suitable for Class 900 and above. RJ Bolted Bonnet uses a metal ring gasket compressed by bolts, providing excellent sealing integrity and easy trim replacement. PSB uses internal line pressure to self-energize the seal, providing the best sealing at the highest pressure. RJ Bolted Bonnet is preferred when maintenance access is important; PSB is preferred for the most extreme pressure service where bolt load alone may not be sufficient. Both designs are fully compliant with BS 5352 and API 602.

Q3: What is the difference between SW, NPT, and BW ends for RJ Bonnet valves?

A: SW (Socket Weld) ends are welded to the pipe, providing excellent leak tightness and full Class 900/1500/2500 pressure capability — preferred for permanent high-pressure installations. NPT (Threaded) ends are screwed onto the pipe without welding — preferred for instrument lines and sampling systems. BW (Butt Weld) ends provide full-penetration welding, the best leak tightness, and are preferred for pipeline and permanent welding applications. For Class 2500 RJ Bonnet service, SW and BW are recommended over NPT due to the extreme pressure rating.

Q4: How do I choose between Ball, Piston, and Swing type?

A: Piston type uses a piston that moves along the flow axis, providing fast closing and tight sealing — the most common type for NPS 1/2 to 1 Class 2500 RJ Bonnet service. Ball type uses a ball that moves along the seat, suitable for viscous fluids and varying flow rates. Swing type uses a hinged disc that swings on a hinge pin, providing lower pressure drop — suitable for NPS 1.5 to 2 sizes in Class 900/1500. For high-pressure small-bore service, Piston type is generally recommended; for larger sizes with lower pressure drop requirements, Swing type can be considered.

Q5: What is the difference between RJ Bonnet and standard BB (flat gasket bolted bonnet)?

A: Standard BB uses a flat or spiral wound gasket between the bonnet and body, compressed by bolts. This is suitable for Class 150 to 600 general service. RJ Bonnet uses a metal ring gasket seated in a machined groove, providing a metal-to-metal seal that is highly reliable for Class 900 and above. RJ Bonnet is preferred for high-pressure wellhead, gas injection, and other critical service. For Class 900/1500/2500, RJ Bonnet is the standard design because flat gaskets may not maintain sealing integrity at these pressure levels.

Q6: Can RJ Bonnet valves be repaired or maintained?

A: Yes — RJ Bolted Bonnet design allows the bonnet to be unbolted for internal trim access. Once the bolts are removed, the bonnet can be lifted off and the RJ ring gasket, disc, seat, and hinge pin can be inspected or replaced. This is a significant advantage over PSB (Pressure Seal Bonnet) designs, which require depressurization and seal ring release before bonnet access. For critical Class 2500 service, we recommend stocking spare RJ ring gaskets and trim parts to minimize downtime.