Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm

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Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 1

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 2

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 3

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 4

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 5

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 6

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 7

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 8

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 9

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 10

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 11

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 12

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 13

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 14

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 15

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 16

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 17

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 18

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 19

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 20

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 21

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 22

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm — factory photo 23

Safety Valves

Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm

Name: Spring Loaded Safety Relief Valve — Full Nozzle Flanged WCB 25 x 50 mm
Brand: Supreme Valves India
Availability: InStock
Rating: 4.8 (127 reviews)

Conventional spring-loaded safety relief valve with angle discharge, full lift, full-nozzle design, open bonnet, open bolted cap, and plain lifting lever. Body in ASTM A216 Gr. WCB (Carbon Steel) for 25 x 50 mm inlet x outlet flanged service. Top-guided unobstructed seat bore delivers maximum rated discharge on steam, hot water, and liquid overpressure protection. Sized per API 520; manufactured and tested to API 526 and API 527. IBR certification and adjustable blowdown available.

Key Applications

Steam Boiler Overpressure ProtectionHot Water Boiler ReliefAutoclave SafetyProcess Steam PipelinesLiquid Hydrocarbon Relief

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Technical Specifications

Valve Type	Angle discharge, spring loaded, full lift, full nozzle, conventional
Nominal Size	25 x 50 mm (inlet x outlet)
Body Material	ASTM A216 Gr. WCB
Design Standard	API 526 / ASME Section VIII Div. 1 / IBR 1950
Sizing Standard	API 520 Part I / Part II
Testing Standard	API 527 seat tightness; individual air test
Pressure Rating	Class 150 to Class 2500; BS 10 Table H and E
Facing	Raised face (RF), flat face (FF), ring type joint (RTJ)
Orifice (Seat) Diameter	19.0 mm to 190.0 mm (size dependent)
End Connection	Flanged RF/FF/RTJ or butt weld
Set Pressure Accuracy	Per ASME / IBR code; adjustable blowdown
Discharge Capacity Basis	IBR formula E = C x A x ((P x 0.980) + 1.033), constant C = 40, capacity in kg/hr saturated steam
Orifice Designations	F 19.0 mm (2.83385 cm²), G 23.0 mm (4.154 cm²), G1 25.0 mm (4.90625 cm²), H 28.0 mm (6.154 cm²), J 31.8 mm (7.942 cm²), K 36.0 mm (10.178 cm²) — designation confirmed against required relieving capacity at sizing stage
Accessories	Balance bellows, packed lever, test gag, lead seal (optional)
Manufacturer	Supreme Valves India

Material of Construction (MOC)

Component / Part	Available Materials
Body	ASTM A216 Gr. WCB
Open Bonnet / Cap / Lever	ASTM A216 Gr. WCB / SG iron (optional)
Nozzle / Nozzle Ring / Guide	ASTM A351 Gr. CF8 / CF8M
Disc	SS 304 / SS 316
Stem / Adjusting Screw	SS 304 / SS 316 / SS 410
Setting Spring	Carbon steel / alloy steel / SS 302 / Inconel (optional)
Studs / Nuts	ASTM A193 Gr. B7 / A194 Gr. 2H
Gasket	Aramid fibre, non-asbestos

Dimensions & Weights

Inlet x Outlet	A ±3.0 mm	B ±3.0 mm	C ±100.0 mm
25 x 50 mm	105	115	456

Service Media

Saturated SteamHot WaterLiquid

Purchase Options

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Features & Benefits

Full Lift High Capacity

Single-spring full-lift design with top-guided unobstructed seat bore for maximum discharge.

Precision Metal Seat

Mirror-polished metal-to-metal seat with precision-lapped disc and nozzle; Stellite trim optional.

WCB Body Construction

Carbon Steel body (ASTM A216 Gr. WCB) for steam and process relief at 25 x 50 mm.

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Valve type: Angle discharge, spring loaded, full lift, full nozzle, conventional
Size: 25 x 50 mm (inlet x outlet)
Material: ASTM A216 Gr. WCB
Pressure class: Class 150 to Class 2500; BS 10 Table H and E

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