What is a silent pressure relief valve?

A silent pressure relief valve is a direct-acting safety valve designed to release excess pressure quietly without the loud pop or noise associated with conventional relief valves. It provides smooth, gradual pressure relief making it ideal for applications where noise is a concern.

What is the pressure range of this valve?

This silent pressure relief valve operates in the pressure range of 0.5 to 10 kg/cm² (approximately 7 to 142 PSI). The set pressure can be adjusted within this range based on your application requirements.

What media can this valve handle?

This valve is suitable for air, water, low temperature oil, and gas applications. The stainless steel CF8/CF8M construction provides excellent corrosion resistance for these media.

What sizes are available?

The silent pressure relief valve is available in sizes from 1/2 inch (15mm) to 4 inch (100mm) with screwed (threaded) end connections. Flanged versions are also available on request.

Silent Pressure Relief Valve Safety Valve Screwed Stainless Steel

In Stock Silent Operation

Safety & Pressure Relief Valves

Silent Pressure Relief Valve (Safety Valve)
Direct Activated, Screwed, Stainless Steel

Name: Silent Pressure Relief Valve (Safety Valve) Screwed
Brand: Supreme Valves
SKU: SV-SILENTPRESSURERELIEF
Rating: 4.8 (127 reviews)

Direct activated "Silent" pressure relief valve (safety valve) with CF8/CF8M stainless steel body. Available in screwed and flanged end connections. Sizes from 1/2" to 4". Pressure range 0.5 to 10 kg/cm². Temperature resistance up to 80°C. Suitable for air, water, low temperature oil, and gas applications.

Quick Specifications

Size: 1/2" to 4"

Pressure: 0.5 - 10 kg/cm²

Material: SS CF8 / CF8M

Temperature: Up to 80°C

End Connection: Screwed (BSP/NPT)

Type: Direct Activated, Silent

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Fast Delivery: Ready stock available. Export packing for international shipments.

Product Specifications

Type	Direct Activated, Silent Operation
Size Range	1/2" (15mm) to 4" (100mm)
Pressure Range	0.5 to 10 kg/cm² (7 to 142 PSI)
Temperature	Up to 80°C (176°F)
Body Material	Stainless Steel CF8 (SS304) / CF8M (SS316)
End Connection	Screwed (BSP / NPT) - Flanged available on request
Media	Air, Water, Low Temperature Oil, Gas
Operation	Spring-loaded, Direct Acting
Set Pressure	Factory set as per customer requirement

Available Sizes

Size (inch)	Size (mm)	Thread	Pressure Range
1/2"	15	BSP / NPT	0.5 - 10 kg/cm²
3/4"	20	BSP / NPT	0.5 - 10 kg/cm²
1"	25	BSP / NPT	0.5 - 10 kg/cm²
1-1/4"	32	BSP / NPT	0.5 - 10 kg/cm²
1-1/2"	40	BSP / NPT	0.5 - 10 kg/cm²
2"	50	BSP / NPT	0.5 - 10 kg/cm²
2-1/2"	65	BSP / NPT	0.5 - 10 kg/cm²
3"	80	BSP / NPT	0.5 - 10 kg/cm²
4"	100	BSP / NPT	0.5 - 10 kg/cm²

Materials of Construction (MOC)

Component	Material Specification
Body & Bonnet	Ductile Iron (ASTM A536 / EN-GJS-400-15)
Stem / Spindle	SS 410 / SS 420
Seat / Trim	EPDM / NBR / Bronze

Technical Specifications

Parameter	Specification / Standard
Manufacturing / Design Standard	EN 1171 / AWWA C509 / BS 5163
Testing Standard	API 598 / EN 12266-1
Pressure Rating	PN16 / PN25

Materials of Construction (MOC)

Part Name	Material
Body & Bonnet	Stainless Steel (ASTM A351 Gr. CF8/CF8M)
Stem / Spindle	SS 304 / SS 316
Seat / Trim	PTFE / Integral
Gland Packing	Graphite / PTFE (Application Dependent)
Handwheel / Actuator	Cast Iron / Steel / SG Iron

Silent Pressure Relief Valve (Safety Valve)Direct Activated, Screwed, Stainless Steel

Quick Specifications

Product Specifications

Available Sizes

Materials of Construction (MOC)

Technical Specifications

Materials of Construction (MOC)

Silent Pressure Relief Valve (Safety Valve)
Direct Activated, Screwed, Stainless Steel