FORGED GATE VALVE PRESSURE SEAL 1500LBS - 2500LBS

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

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PSB Forged Gate Valve 1500LBS – 2500LBS (SW, NPT Ends) - API602

China Industrial Pressure Seal Bonnet (PSB) Forged Gate Valve 1500LBS – 2500LBS Supplier, Exporter, Manufacturer. This page covers Class 1500 and Class 2500 forged gate valves with Pressure Seal Bonnet (PSB) construction and SW or NPT ends, manufactured per API 602. Solid wedge, OS&Y rising stem. PSB design uses internal pressure to self-energize the bonnet seal — sealing performance increases as line pressure rises, making it ideal for ultra-high-pressure and high-temperature service. Sizes 1/2 inch to 2 inch (DN15 to DN50). Body materials include carbon steel (A105, LF2), alloy steel (F5, F11, F22), stainless steel (F304, F316), duplex steel (F51, F53). NACE MR 0175 available. Ideal for ultra-high-pressure steam, power generation, oil and gas wellhead and chemical service where leak-tightness is critical.

Specifications for PSB Forged Gate Valve 1500LBS – 2500LBS (SW, NPT Ends)

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

• Pressure Ratings: ANSI Class 1500LBS and 2500LBS (1500# – 2500#)

• Constructions: OS&Y, Pressure Seal Bonnet (PSB) — self-energizing seal

• Bore Type: Full Port (FB) / Reduced Port (RB)

• Size Range: 1/2 inch to 2 inch (DN15 to DN50)

• Socket Weld Ends: Per ANSI B16.11 — permanent leak-tight connection for ultra-high-pressure piping

• Threaded Ends: NPT per ANSI B1.20.1 — easy installation and removal without welding

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

• Trim Materials: 13Cr, STL, SS304, SS316, F6a, Hard Faced, Full Hard Faced

• Sour Service: NACE MR 0175 on Request

• Inspection and Test: API 598

• Temperature Range: -29°C to 425°C (-20°F to 800°F)

✓ Pressure seal bonnet design — self-energizing seal for ultra-high-pressure service, tighter as line pressure increases

PSB vs BB Bonnet Design Comparison

Feature	PSB (Pressure Seal Bonnet)	BB (Bolted Bonnet)
Sealing Principle	Self-energizing by internal pressure	Compression by bolts and gasket
Sealing Performance	Tighter as line pressure increases	Constant, depends on bolt preload
Maintenance	More complex, requires special tools	Easy access for trim replacement
Best Application	Ultra-high-pressure, critical leak-tightness	General high-pressure, maintenance-prone

Reference: API 602. PSB is preferred for Class 1500 and 2500 where ultimate leak-tightness is required. BB remains the choice for maintenance-prone service. Choose based on project specification.

Class 1500 – 2500 PSB Forged Gate Valve Material Comparison

Body Material	Grade	Temp. Range	Best For
Carbon Steel	A105, A105N, LF2	-29°C to 425°C	Ultra-high-pressure steam, oil and gas, water injection
Alloy Steel	F5, F11, F22	Up to 593°C	High-temperature ultra-high-pressure steam, refinery
Stainless Steel	F304, F304L, F316, F316L	-196°C to 425°C	Corrosive ultra-high-pressure media, chemical, offshore
Duplex Stainless Steel	F51, F53	-50°C to 300°C	High-chloride, seawater, sour ultra-high-pressure service

Reference: API 602, ASME B16.34. Temperature range varies with pressure class and trim material. Contact us for confirmed material certificate.

Class 1500 and 2500 PSB vs Adjacent Pressure Classes

Pressure Class	Design Pressure (bar)	Design Pressure (psi)	Recommended Bonnet
Class 900	153	2,220	BB or WB
Class 1500	260	3,750	PSB (this page) or BB
Class 2500	430	6,250	PSB (this page) preferred

Reference: ASME B16.34. Design pressure values are for reference only and vary with material and temperature. For Bolted Bonnet (BB) design at Class 1500 and 2500, see the BB page.

Pressure Sealing Bonnet Forged Gate Valve Main Parts

S.No.	Part Name	S.No.	Part Name
1	Body	13	Stem Nut
2	Seat Ring	14	Lock Nut
3	Wedge	15	Name Plate
4	Stem	16	Hand Wheel
5	Gasket	17	Pad
6	Bonnet	18	Packing
7	Bolt	23	Gasket Ring
8	Pin	24	Seal Ring
9	Gland	25	Seal Seat
10	Eye-bolt	26	Nut Block
11	Packing Plate	27	Tightening Nut
12	Hex Nut	—	—

PSB Forged Gate Valve 1500LBS – 2500LBS (SW, NPT Ends) Dimensions

NPS (inch)	DN (mm)	L (mm) - Class 1500 PSB	L (mm) - Class 2500 PSB
1/2″	15	140	186
3/4″	20	140	186
1″	25	178	232
1-1/4″	32	178	232
1-1/2″	40	216	279
2″	50	216	279

Reference: API 602 / ASME B16.10. PSB (Pressure Seal Bonnet) design, SW/NPT ends. Dimensions may vary by manufacturer. Contact us for confirmed drawing and quotation.

PSB Forged Gate Valve 1500LBS – 2500LBS Applications

• Ultra-High-Pressure Steam: Main steam isolation, steam injection and boiler blowdown on small-bore ultra-high-pressure lines where leak-tightness is critical.

• Oil and Gas Wellhead: Wellhead control panels, gas injection and chemical injection lines at Class 1500 and 2500.

• Power Generation: Ultra-supercritical boiler drain, air vent and sampling line isolation on small-bore ultra-high-pressure piping.

• Petrochemical: Hydrocracking, hydrotreating and ultra-high-pressure reagent injection lines requiring self-sealing reliability.

• Chemical Processing: Ultra-high-pressure reagent feed, catalyst injection and corrosive fluid isolation.

• Subsea and Offshore: Subsea wellhead control, high-pressure chemical injection and hydraulic control systems.

FAQ - PSB Forged Gate Valve 1500LBS – 2500LBS (SW, NPT Ends)

Q1: How does the pressure seal bonnet (PSB) work?

A: In PSB design, the bonnet is sealed by internal line pressure pushing the bonnet upward against a metal gasket. As line pressure increases, the sealing force increases, making the joint tighter. This self-energizing effect is why PSB valves are preferred for ultra-high-pressure Class 1500 and 2500 service.

Q2: When should I choose PSB over BB for Class 1500 and 2500?

A: Choose PSB when ultimate leak-tightness is critical and the valve is not expected to require frequent trim maintenance. Choose BB when maintenance accessibility and trim replacement are important. PSB is standard for critical ultra-high-pressure steam, wellhead and subsea service. BB remains cost-effective for maintenance-prone applications.

Q3: What end connections are available for PSB forged gate valves?

A: We offer Socket Weld (SW) per ANSI B16.11 and Threaded (NPT) per ANSI B1.20.1. SW provides a permanent, full-penetration welded connection for the highest pressures. NPT allows easy installation and removal where welding is not practical. BW is also available on request for larger bore piping.

Q4: What is the difference between Class 1500 and Class 2500 PSB gate valves?

A: Class 1500 has a design pressure of 260 bar (3,750 psi), suitable for ultra-high-pressure steam, gas injection and wellhead equipment. Class 2500 reaches 430 bar (6,250 psi) for the most demanding ultra-high-pressure applications. Class 2500 uses thicker walls, heavier trim and larger face-to-face dimensions (e.g., 2 inch: 279 mm vs 216 mm at Class 1500).

Q5: What materials and trim options are available for PSB gate valves?

A: Standard body materials include carbon steel (A105, A105N, LF2), alloy steel (F5, F11, F22), stainless steel (F304, F304L, F316, F316L) and duplex stainless steel (F51, F53). Trim options include 13Cr, STL, SS304, SS316 and F6a. Material and trim selection depends on operating temperature, pressure and fluid corrosiveness.

Q6: Is NACE MR 0175 available for PSB gate valves?

A: Yes, NACE MR 0175 compliance is available on request for sour oil and gas applications. This includes material selection, hardness control and testing to ensure resistance to sulfide stress cracking. Please specify NACE MR 0175 in your inquiry.