Safety Relief Valve

Model / MPN: 16971-F REV B | NSN: 4820-01-299-8435

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes valve (1), relief, pressure and temperature.

Product Details

NATO Stock Number

4820-01-299-8435

Sold in multiples of

1 EA

DEMIL

Flow Control Device

Disk

Bonnet Type

Packing retaining

Disk Loading Method

Spring

Bolt Hole Quantity

8 all ends

Maximum Operating Temp

450.0 degrees fahrenheit single response

Valve Operation Method

Automatic

Flange Shape

Round with holes all ends

Connection Type

Flange all ends

Valve Size

4.000 inches

Maximum Operating Pressure

285.0 pounds per square inch single response

Opening Pressure Setting

170.0 pounds per square inch

Outside Diameter

11.000 inches 1st end

Outside Diameter

9.000 inches 2nd end

Thickness

0.812 inches 2nd end

Thickness

1.000 inches 1st end

Bolt Hole Diameter

0.750 inches 2nd end

Bolt Hole Diameter

0.875 inches 1st end

Bolt Circle Diameter

7.500 inches 2nd end

Bolt Circle Diameter

9.500 inches 1st end

Flange Face Design

Raised straight all ends

Raised Face Height

0.062 inches all ends

Raised Face Diameter

6.188 inches 2nd end

Raised Face Diameter

8.500 inches 1st end

Material

Steel body

Material

Stainless steel flow control device

Material

Stainless steel seat

Media For Which Designed

Water-oil-gas single response

16971 Series Parts

Pricing and Availability

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Certified Quality Assurance

ISO 9001:2015 + AS9120B
Counterfeit Parts Prevention
100% Product Inspections
7 Year Record Retention
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HAZMAT Certified
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16971-F REV B Cross Reference

26PA11-170