Model: HH-2

Safety Relief Valve

Properties:

Pipe Size Accommodated

1.000 inches 2nd end

Flow Control Device

Disk

Bolt Hole Quantity

4 1st end

Maximum Operating Temp

425.0 degrees fahrenheit single response

Valve Operation Method

Automatic or manual

Flange Shape

Round with holes 1st end

Connection Type

Flange 1st end

Connection Type

Unthreaded internal pipe 2nd end

Valve Size

0.750 inches

Maximum Operating Pressure

300.0 pounds per square inch single response

Opening Pressure Setting

7.5 pounds per square inch

Outside Diameter

3.812 inches 1st end

Thickness

0.438 inches 1st end

First Connection Face To Centerline Distance

4.875 inches

Bolt Hole Diameter

2.812 inches 1st end

Second Connection Face To Centerline Distance

3.031 inches

Bolt Circle Diameter

0.562 inches 1st end

Flange Face Design

Plain 1st end

Material

Copper alloy

Material Specification

Qq-c-390, alloy d4/d/ federal specification single material response

NSN

4820-01-077-7208

Part Number

HH-2

Description

Valve,safety Relief

CAGE

15187

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.

Part HH-2 NSN 4820-01-077-7208

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

05488

FIIG:

A046B0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

22.0000lbs

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

127220

UFC:

64490

LTL:

77.5

LCL:

WCC:

594

TCC:

SHC:

ACC:

Trailers/Vehicles

Pricing & Availability Check

Submit this form for stock availability and pricing.

How to Order

Ordering from buyaircraftparts.com

If you would like to order this safety relief valve (NSN 4820-01-077-7208) please submit the pricing and availability form above to receive an up to date quote by email. If you agree to the pricing and terms you can e-sign your order online!

We are pleased to have the opportunity to serve you.

Have a Question

Hours:	08:00-18:00 Eastern Standard Time
Phone:	+1 470-231-0824
Email:	Contact Form »

Schedule B and Export

Schedule B: 8481400000
SITC: 74740
End Use: Industrial machines, other
NAICS: 332911
USDA: 1

Freight Class: Safety or relief valves