Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm

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Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 1

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 2

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 3

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 4

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 5

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 6

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 7

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 8

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 9

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 10

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 11

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 12

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 13

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 14

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 15

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 16

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 17

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 18

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 19

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 20

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 21

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 22

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm — factory photo 23

Safety Valves

Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm

Name: Spring Loaded Thermal Safety Relief Valve — Modified Nozzle Screwed CF8 (SS304) 40 x 50 mm
Brand: Supreme Valves India
Availability: InStock
Rating: 4.8 (127 reviews)

Screwed-end spring-loaded full-lift thermal and pressure safety relief valve with modified nozzle, open cap, and plain lever. ASTM A351 Gr. CF8 body for 40 x 50 mm on small bore steam and SIB applications. Maximum set pressure 8.5 kg/cm²g on applicable sizes. Orifice 12.7 mm and 19.0 mm.

Key Applications

Small Industrial Boiler ReliefScrewed Steam Line ProtectionCompact Thermal ReliefOEM Equipment Safety

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Technical Specifications

Valve Type	Angle discharge, spring loaded, modified nozzle, screwed end thermal SRV
Nominal Size	40 x 50 mm (inlet x outlet)
Body Material	ASTM A351 Gr. CF8
End Connection	Screwed BSP / NPT
Orifice Options	F (19.0 mm dia, 2.83385 cm²)
Discharge Capacity Basis	IBR formula E = C x A x ((P x 0.980) + 1.033), constant C = 24, capacity in kg/hr saturated steam
Saturated Steam Capacity (Orifice F)	3 kg/cm²g = 270 kg/hr, 5 kg/cm²g = 404 kg/hr, 7 kg/cm²g = 537 kg/hr, 10 kg/cm²g = 737 kg/hr, 14 kg/cm²g = 1,003 kg/hr
Maximum Set Pressure	8.5 kg/cm²g (size dependent)
Trim	CF8 / CF8M / SS 304 / SS 316
Manufacturer	Supreme Valves India

Material of Construction (MOC)

Component / Part	Available Materials
Body	ASTM A351 Gr. CF8
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. B8 / A194 Gr. 8
Gasket	Aramid fibre, non-asbestos

Dimensions & Weights

Inlet x Outlet	A ±3.0 mm	B ±3.0 mm	C ±100.0 mm
40 x 50 mm	67	92	360

Purchase Options

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Features & Benefits

Compact Screwed Connection

Small-bore screwed ends for SIB and equipment package mounting.

Full Lift Modified Nozzle

Top-guided seat for accurate blow-off and repeatability.

CF8 (SS304) Body

ASTM A351 Gr. CF8

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Valve type: Angle discharge, spring loaded, modified nozzle, screwed end thermal SRV
Size: 40 x 50 mm (inlet x outlet)
Material: ASTM A351 Gr. CF8

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