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Bray Bray/Rite® Wafer Combination Swing Check Valve (1" to 60" Pump Protection and Water Hammer Control)

Wafer combination swing check valve, fully open at low flow velocity, for pump protection and water hammer control.

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Bray Bray/Rite® wafer combination swing check valve for 1" to 60" pipelines, available with wafer, flanged, and RTJ body configurations. The valve uses SS316 as the standard disc material and provides zero-leakage sealing. It reaches the fully open position at an average flow velocity of 3 ft/s, making it suitable for backflow prevention at industrial pump outlets and low-velocity, variable-flow process pipelines with control valves. It helps reduce water hammer, pressure drop, and vibration.

Specifications

Size Range: 1" to 60" (25mm to 1500mm)
Body Type: Wafer, flanged, RTJ
Body Materials: ASTM A 126 CLB, ASTM A 395, ASTM A 216 WCB, ASTM A 351 CF8M, titanium
Disc Material: Standard SS316 (or higher grade)
Seat Materials: BUNA-N, EPDM, A240-304 (inserted or integral), PFTE, fluoroelastomer
Leakage Class: Zero leakage
Maximum Allowable Operating Pressure: API 594 (150, 300, 600, 900, 1500, 2500); ASME (125, 150, 300); PN (10, 16, 25, 40)
Minimum Flow Velocity at Full Open: Average 3ft/s
Design Standards: API 594, ASME B16.34
Test Standards: API 598, ASME B16.34
Face-to-Face Standards: ANSI, API 594
Certifications: API 6FD, CE, CRN, FM, NSF-61, PED, ULC

Application scenarios

Industrial Pump Discharge Check Protection

Installed in pump discharge piping to prevent media backflow and reduce water hammer caused by pump shutdown or flow-direction changes through check action, thereby protecting the pump.

Low-Velocity, Variable-Flow Process Piping with Control Valves

Suitable for process piping equipped with control valves and subject to flow variations. The optimized bore and disc profile enable the valve to fully open at low flow velocities averaging 3 ft/s, helping reduce pressure drop and vibration caused by a partially open disc while minimizing wear on internal components.

Selection points

Rite-sized design for full opening at low flow velocity

The Bray/Rite internal diameter and disc geometry are optimized to achieve full opening at an average low flow velocity of 3 ft/s. Unlike conventional full-size swing check valves, which require higher flow velocities to open fully, this design helps avoid throttling resistance and water hammer risks caused by a partially open disc, making it suitable for pump systems with significant flow variation.

Limited internal movement reduces wear

Internal components undergo limited movement during operation, reducing mechanical wear caused by repeated disc oscillation and helping extend valve service life and maintenance intervals.

Multiple seat material options

Multiple seat material options are available, including BUNA-N, EPDM, PTFE, and fluoroelastomer. Selection can be matched to the medium compatibility and temperature requirements.

Wide size range

This series covers sizes from 1 inch to 60 inches (25mm to 1500mm), making it suitable for piping systems with different line sizes.

Multiple body configurations

Wafer, flanged, and RTJ body configurations are available to accommodate different piping connection methods.

Installation & maintenance notes

Confirm installation orientation and medium flow direction

During installation, confirm the medium flow direction according to the markings on the valve body to ensure that the disc opens and closes in the designed direction and provides effective check and pump protection.

Ensure the disc can open fully

During installation and commissioning, consider the actual flow rate and ensure that the disc can open fully under normal operating conditions. An incompletely open disc may increase flow resistance and pressure drop, cause disc vibration, and increase the risk of water hammer.

Verify seat material compatibility with the temperature conditions

Before installation, verify based on the actual model and configuration that the selected seat material is compatible with the medium and temperature conditions. This helps prevent seal failure or leakage caused by unsuitable materials.

Confirm compatibility between the valve and piping connections

Before installation, confirm that the valve end configuration matches the piping connection type and keep the valve and piping properly aligned. Uneven connection loads may result in seal failure or external leakage.

FAQ

How do Bray/Rite check valves work?

Bray/Rite check valves use a wafer-style swing design and flow-actuated characteristics to achieve near-full disc opening at low flow velocities, reducing wear and pressure loss while protecting pumps and controlling media flow.

How does this valve perform at low flow velocities compared with conventional valves of the same size?

Bray/Rite® reaches the fully open position at low flow velocity (average 3 ft/s), compared with conventional full-size swing valves that typically require approximately 11 ft/s to fully open. This provides more stable fluid control and reduces the risk of water hammer.

What are the main technical advantages of this valve series?

Rite sizing optimizes the valve bore and disc geometry to reduce wear, extend service life, and enable smooth opening and closing at low pressure, improving controllability and durability in multi-media piping systems.

What applications is it suitable for, and what value does it provide to the system?

It is suitable for applications requiring pump protection and reduced water hammer risk. It provides more stable opening and shutoff in pipelines with control valves and multi-media flow, improving system reliability.

What information should be considered during selection to ensure a proper match?

Confirm the size range (1"〜60"), body material, gasket material, seat material, leakage class, seat and disc materials, as well as end connections (wafer, flanged, RTJ) and design standards to match the medium, temperature, and pressure rating.

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