Vent-check Valve

Model / MPN: 3-340-1 | NSN: 4820-01-274-4714

A dual purpose marine valve used primarily with shipboard cargo tanks and bulkheads. It acts both as a vent valve, to relieve vacuum and pressure, and a check valve, to prevent cargo contamination. It is equipped with an internal flame screen and/or a protective mesh and may include a hinged cover.

Product Details

NATO Stock Number

4820-01-274-4714

Sold in multiples of

1 EA

DEMIL

Valve Operation Method

Automatic

Flange Shape

Round with holes all ends

Connection Type

Flange all ends

Mounting Position

Vertical

Valve Size

1.250 inches

Maximum Operating Pressure

150.0 pounds per square inch single response

Outside Diameter

4.625 inches all ends

Face To Face Distance

6.750 inches

Flange Face Design

Plain all ends

Style Designator

Straight through flanged ends

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

Certified Quality Assurance

ISO 9001:2015 + AS9120B
Counterfeit Parts Prevention
100% Product Inspections
7 Year Record Retention
On Time Delivery
HAZMAT Certified
Worldwide Shipping

3-340-1 Cross Reference

52-95F 1 1/4IN
52-95F 1 1/4 IN AND 3-430-1