Forged Globe Valve 900LBS - 2500LBS (Pressure Seal 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

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PSB Forged Globe Valve 900LBS – 2500LBS (SW, NPT Ends) - API602, 1/2 inch to 2 inch

China Industrial Pressure Seal Bonnet (PSB) Forged Globe Valve 900LBS – 2500LBS Supplier, Exporter, Manufacturer. The API 602 PSB forged steel globe valve is designed for ultra-high-pressure small-bore throttling and isolation with Socket Weld (SW) and Threaded (NPT) ends. 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. OS&Y rising stem, handwheel operated. Plug disc and needle disc supplied. Full port (full bore) design for maximum flow.

Sizes: 1/2″, 3/4″, 1″, 1-1/4″, 1-1/2″, 2″ (DN15 to DN50). Body materials include carbon steel (A105, LF2), alloy steel (F5, F11, F22), stainless steel (F304, F316) and duplex steel (F51). Various trim options available. NACE MR 0175 on request.

Specifications for PSB Forged Globe Valve 900LBS – 1500LBS – 2500LBS (SW, NPT Ends)

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

• Pressure Ratings: ANSI Class 900LBS, 1500LBS and 2500LBS (900# – 2500#)

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

• Bore Type: Full Port (Full Bore)

• Disc Type: Plug Disc, Needle Disc

• 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, Screwed per ANSI B1.20.1

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

• Trim Materials: 13Cr (1#), Half Stellite (5#), Full Stellite (5#), SS304, SS316

• 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 900 to 2500 where ultimate leak-tightness is required. BB remains the choice for maintenance-prone service. Choose based on project specification.

PSB Forged Globe Valve Materials List

Material Type	Grade	Typical Application
Carbon Steel	A105, LF2	Ultra-high-pressure steam, oil and gas, water injection
Alloy Steel	F5, F11, F22	High-temperature ultra-high-pressure steam, refinery
Stainless Steel	F304, F316	Corrosive ultra-high-pressure media, chemical, offshore
Duplex Stainless Steel	F51	High-chloride, seawater, sour ultra-high-pressure service

Reference: API 602, ASME B16.34. Trim options: 1# (13Cr), 5# (Half or Full Stellite), SS304, SS316. Contact us for confirmed material certificate.

Class 900, 1500 and 2500 PSB vs Adjacent Pressure Classes

Pressure Class	Design Pressure (bar)	Design Pressure (psi)	Recommended Bonnet
Class 800	138	2,000	BB or WB
Class 900	153	2,220	PSB (this page) or BB
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 900 to 1500, see the BB page.

Pressure Sealing Bonnet Forged Globe Valve Main Parts

S.No.	Part Name	S.No.	Part Name
1	Body	15	Name Plate
3	Disc	16	Hand Wheel
4	Stem	18	Packing
6	Bonnet	21	Stem Block
8	Pin	22	Disc Nut
9	Gland	23	Gasket Ring
10	Eyebolt	24	Seal Ring
11	Packing Gland	25	Seal Seat
12	Hex Nut	26	Nut Block
13	Stem Nut	27	Tightening Nut
14	Lock Nut	—	—

PSB Forged Globe Valve 900LBS – 2500LBS (SW, NPT Ends) Dimensions

NPS (inch)	DN (mm)	L (mm) - Class 900-1500	L (mm) - Class 2500
1/2″	15	140	186
3/4″	20	140	186
1″	25	140	186
1-1/4″	32	178	232
1-1/2″	40	178	232
2″	50	216	279

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

PSB Forged Globe Valve 900LBS – 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 900 to 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 Globe Valve 900LBS – 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 900 to 2500 service.

Q2: When should I choose PSB over BB for Class 900 to 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 globe valves?

A: We offer Socket Weld (SW) per ANSI B16.11 and Threaded (NPT, Screwed) 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 900, 1500 and 2500 PSB globe valves?

A: Class 900 has a design pressure of 153 bar (2,220 psi), Class 1500 reaches 260 bar (3,750 psi) and Class 2500 reaches 430 bar (6,250 psi). Class 2500 uses thicker walls, heavier trim and larger face-to-face dimensions than Class 900 and 1500.

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

A: Standard body materials include carbon steel (A105, LF2), alloy steel (F5, F11, F22), stainless steel (F304, F316) and duplex stainless steel (F51). Trim options include 13Cr (1#), Half Stellite (5#), Full Stellite (5#), SS304 and SS316. Material and trim selection depends on operating temperature, pressure and fluid corrosiveness.

Q6: Is NACE MR 0175 available for PSB globe 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.