American Standard Check Valve

Detailed product information

1. The check valve is designed to allow the medium to flow in only one direction and prevent reverse flow. As a rule, this valve operates automatically: under the pressure of the flow in the working direction, the gate opens; when the flow reverses, the pressure of the medium and the weight of the gate press it against the seat, blocking the flow.

2. The swing check valve has a hinge mechanism and a valve that rests freely on the inclined surface of the seat, similar to a door. To ensure correct positioning of the valve on the seat each time it closes, the hinge mechanism is designed so that the valve has a sufficient angle of rotation and ensures full contact with the seat. The gate can be made entirely of metal, or with leather/rubber inserts or a synthetic coating, depending on the operating requirements. When the swing check valve is fully open, the flow of the medium encounters virtually no resistance, so the pressure drop across the valve is relatively small.

Product parameters

♦  Product standards: API 6D, API 594, BS 1868, ASME B16.34

♦  Nominal pressure: 150LB-2500LB

♦  Nominal diameter: 2“-50”

♦  Body material:

A216 WCB, WCC

A217 WC6, WC9, C5, C12, C12A, CA15

A351 CF8, CF8M, CF3, CF3M

A352 LCB, LCC

♦ Operating temperature: -196℃~593℃

♦ Operating media: water, steam, petroleum products, nitric acid, acetic acid, strong oxidizers, urea, etc.

♦ Connection method: flanged, butt welded

♦ Control method: automatic opening/closing under the action of the medium, with the option of adding a counterweight for quick closing or a hydraulic cylinder for smooth closing of the valve

♦ Test standards: API 598, ISO 5208