Dual Plate Check Valve Manufacturer in USA

SVR Global is a manufacturer of dual plate check valves in USA, engineering wafer style check valves for pipeline systems that require one directional flow control with fast closing action. Our valves are built to API 594, API 6D, and ASME B16.34 standards, and are supplied to end users, EPC contractors, and stockists across the country.

Types of dual plate check valve:

Dual Plate Flanged Check Valve-
Valve with flanged ends bolted to mating pipe flanges, suited to higher pressure classes and larger sizes.

Dual Plate Lug Check Valve-
Valves with lugged bodies bolted independently on each side, allowing one side of the line to be removed for maintenance.

Dual Plate Wafer Check Valve-
Valve in a slim body clamped between pipe flanges, offering the lowest weight and smallest face to face dimension.

How dual plate valve Operates?

1. Forward flow pressure pushes the two discs open around the central hinge pin

2. Fluid passes through the open discs with a low pressure drop across the valve body

3. As flow decreases or the pump stops, the spring mechanism begins closing the discs

4. The discs seat fully before reverse flow can build velocity, limiting slam and pressure surge in the line

Because closure is spring assisted rather than gravity dependent, these valves can be installed horizontally or vertically, in any orientation the piping layout requires.

Key Parts of a Dual Plate Check Valve:

• Body - Houses the internal components; flanged, lug, or wafer style

• Two Discs (Plates) - Semicircular discs that open and close to control flow direction

• Hinge Pin - Central pin on which both discs pivot

• Springs - Assist disc closure once forward flow drops or reverses

• Seat - Sealing surface the discs close against; metal to metal or resilient soft seat

• Stop Pin - Limits disc travel to set the fully open position

• Retaining Pin / Body Plug - Secures the hinge pin within the body

• Bushings - Support the hinge pin and reduce wear at pivot points

Design and Construction Features:

• Body style: Wafer, lug, and double flanged patterns

• End connections: ANSI/ASME flanged, butt weld

• Size range: 2" to 48" (custom sizes on request)

• Pressure classes: Class 150 to Class 2500

• Seat options: Metal to metal or resilient soft seat

• Body materials: Carbon steel (WCB, A216), stainless steel (CF8, CF8M), alloy steel, duplex and super duplex, Monel, Hastelloy

• Disc and spring materials: 316 stainless steel, Inconel, Hastelloy, per service compatibility

• Testing: Hydrostatic shell and seat testing per API 598, with third-party inspection available

Applications of Dual plate check valve:

Dual plate check valves supplied by SVR Global are used in-

• Oil and gas upstream, midstream, and downstream pipelines

• Refineries and petrochemical processing units

• Marine and offshore piping, including ballast and bilge lines

• Power generation plants, cooling water and feedwater lines

• Water and wastewater treatment infrastructure

• Mining and mineral processing pipelines

• Pulp and paper processing lines

• Fire water and firefighting distribution systems

Standards and Certifications:

Our dual plate check valves are designed and tested to-

• API 594 - Check valves

• API 6D - Pipeline valves

• ASME B16.34 - Valves, flanged, threaded, and welding end

• ASME B16.5 / B16.47 - Flange dimensions

• API 598 - Valve inspection and testing

• NACE MR0175 / MR0103 - Sour service materials