Bray Double-Door Check Valve | 2" to 12" Industrial Pump Protection

Wafer-style double-door check valve for backflow prevention at pump outlets, with SS316 valve plates

Genuine product assurance

We can help verify product data and purchasing details.

Model confirmation

Confirm model, connection and key options before ordering.

After-sales support

After-sales communication support is provided according to the order agreement.

Bray dual-plate check valves are 2" to 12" wafer-style swing check valves featuring ductile iron or stainless steel bodies, SS316 dual plates, and EPDM or nitrile rubber seats, suitable for Class 150 pressure service. The valves comply with API 594 design and API 598 sealing test requirements. They are used in industrial pump discharge piping to prevent media backflow during shutdown or reverse flow and help reduce the likelihood of water hammer.

Specifications

Size Range

2" to 12" (50mm to 300mm)

Maximum Allowable Operating Pressure

Class 150

Temperature Range

-50°F to 300°F EPDM, -40°F to 250°F NBR

Body Material

Ductile iron, stainless steel

Disc Material

SS316

Seat Material

EPDM, Buna

Body Type

Wafer swing type

Sealing Rating

API 598

Design Standard

API 594

Face-to-Face Standard

API 594

Test Standard

API 598

Certifications

CE, CRN, NSF-61, PED

Application scenarios

Protection of industrial pump outlet pipelines

Installed in industrial transfer pump outlet pipelines to prevent media backflow when the pump is shut down or reverse flow occurs. The lightweight dual-disc design and independent springs enable rapid closure and help reduce the potential for water hammer. The short, straight flow path helps minimize head loss.

Selection points

Independent springs for rapid closure to reduce water hammer risk

Lightweight dual discs with responsive independent springs provide rapid closing and cushioned sealing, reducing the likelihood of water hammer. Suitable for pump protection and industrial piping with backflow risk.

Low cracking pressure and low head-loss flow path

Lightweight spring-loaded discs provide low cracking pressure, while the profiled body provides a short, straight flow path and reduces turbulence, helping minimize head loss.

Compact wafer swing check valve installation

This valve features a wafer swing check design, with sizes from 2in to 12in. Its face-to-face dimensions comply with API 594, providing a compact installation length and convenient installation.

SS316 discs and resilient seat options

The discs are made of SS316. EPDM or Buna rubber seats are available, and the body is available in ductile iron or stainless steel. Configurations can be selected according to media conditions and sealing material requirements.

Temperature range selected by seat material

EPDM seats are suitable for temperatures from -50F to 300F, while Buna rubber seats are suitable for temperatures from -40F to 250F. Temperature selection should correspond to the seat material.

API standards and project certification options

Product design and face-to-face dimensions comply with API 594. Testing and sealing ratings comply with API 598. CE, CRN, NSF-61, and PED certifications are listed.

Installation & maintenance notes

Verify seat temperature range and maximum allowable operating pressure

Before installation and commissioning, verify the operating temperature and system pressure against the actual seat configuration. EPDM seats are suitable for temperatures from -50°F to 300°F, Buna rubber seats are suitable for temperatures from -40°F to 250°F, and the maximum allowable operating pressure is Class 150. Do not exceed the applicable limits.

FAQ

How does the dual-plate check valve achieve rapid closure to reduce the risk of water hammer?

This product uses dual discs with independent springs. When flow is activated, the springs assist rapid closure and provide cushioned sealing, reducing the likelihood of water hammer.

What is the relationship between the valve cracking pressure and energy-efficient operation?

Due to the lightweight discs and spring loading, the cracking pressure is low, enabling energy-efficient operation and reducing operating load.

What are the main design features of this valve?

Features include light weight, short laying length, a small footprint, and easy installation. It also has a short, straight flow path to minimize turbulence and head loss.

What sizes and materials are available?

The size range is 2 inches to 12 inches (50 mm to 300 mm); body materials include ductile iron and stainless steel, the discs are SS316, the sealing material is PTFE, and seat materials are EPDM or Buna.

Which key parameters should be considered during selection to ensure suitability for the application?

Consider parameters such as size range, maximum allowable operating pressure, temperature range, sealing rating, and certifications; specific configurations must be confirmed according to the actual model and application conditions.