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Brand: Bray International
Bray/Rite Double Door Wafer Check Valve, NPS 2 to 12, Class 150
Description
A short, light non-slam check valve for pump discharge lines
The Bray/Rite double door check valve is a wafer-style check valve that protects pumps and pipelines against flow reversal. Two lightweight spring-loaded discs open with the flow, and independent springs close them quickly as the flow stops, which Bray says reduces the water hammer potential compared with a swing check. A contoured body gives a short, straight flow path with minimal turbulence and head loss.
The valve is made in NPS 2 to 12 (DN 50 to 300) in ASME Class 150 flange connection. Bray states it is designed according to API 594 and tested according to API 598, that it is CE marked in accordance with PED 2014/68/EU, and that all valves are registered under a Canadian Registration Number (CRN) in Canada.
Technical specifications
| Parameter | Specification |
|---|---|
| Size range | NPS 2 to 12 (DN 50 to 300) |
| Pressure class | ASME Class 150 flange connection |
| Design and test | Designed to API 594; tested to API 598 |
| Shell test pressure | 450 psi |
| Seat test pressure | 325 psi |
| Working temperature, EPDM | -50 to 300 deg F |
| Working temperature, Buna | -40 to 250 deg F |
| Body option 1 (DXX15DEZNSF) | Ductile iron ASTM A536 Gr 65-45-12; stainless steel CF8M discs; EPDM seat; marked NSF-G and CE |
| Body option 2 (DXX15DBZ) | Ductile iron ASTM A536 Gr 65-45-12; CF8M discs; Buna seat; marked CE |
| Body option 3 (DXX15XEZ) | Stainless steel ASTM A351 CF8M; CF8M discs; EPDM seat; marked CE |
| Pins, springs, plugs | SS316 |
| Spacers | PTFE |
| Springs | Dual independent springs with extended legs to prevent seat scrubbing |
| Certification | CE (PED 2014/68/EU); CRN |
| Face to face (API 594) | 54 mm at DN 50; 67 mm at DN 100; 95 mm at DN 150; 127 mm at DN 200; 181 mm at DN 300 |
Source: Bray/Rite brochure R-3002 dated 2018-04. Part number code XX is the valve size in inches, for example D0415XEZNSF designates a 4 inch valve.
Face-to-face, flange diameter and head loss
The short laying length saves cost and space and makes installation easier than a full-body swing check. Bray prints face-to-face and flange diameter for each size, and flow and head loss charts for liquids and a pressure-drop formula for gas service, based on Cv.
| Size | Dimension (API 594) |
|---|---|
| DN 50 (2 in) | 54 mm face to face, 104 mm diameter |
| DN 80 (3 in) | 67 mm face to face, 135 mm diameter |
| DN 100 (4 in) | 67 mm face to face, 162 mm diameter |
| DN 150 (6 in) | 95 mm face to face, 218 mm diameter |
| DN 200 (8 in) | 127 mm face to face, 273 mm diameter |
| DN 250 (10 in) | 140 mm face to face, 328 mm diameter |
| DN 300 (12 in) | 181 mm face to face, 378 mm diameter |
Application notes and what to confirm
A double door check valve is typically installed between flanges on the discharge of a pump, ahead of a header or on a cooling-water line. Bray publishes flow and head-loss charts and a CheckSize sizing tool, and lists check valve accessories such as external springs and weights. Please confirm the line size, medium, temperature, flow direction and orientation, flange standard (the valve fits between ASME Class 150 flanges), body and seat material and whether NSF-G marking is required.
| Part number code | Body and seat | Marking |
|---|---|---|
| DXX15DEZNSF | Ductile iron, EPDM | NSF-G, CE |
| DXX15DBZ | Ductile iron, Buna | CE |
| DXX15XEZ | Stainless steel CF8M, EPDM | CE |
Documents and quotation
The brochure R-3002 is attached as the datasheet. Bray also offers a CheckSize sizing tool for the check valve range on its website.
See the wider range of fittings and valves on our catalogue, or send the model name and order number for a quotation.
Datasheets & Documents
- Datasheet Bray/Rite Double Door Check Valves product brochure R-3002 (2018) Download
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About brand
Bray International is the Houston-based maker of butterfly valves, knife gate and slurry valves, actuators and valve controls. It was incorporated in Houston on 23 April 1986, founded by Craig C. Brown and Frank J. Raymond, and assembled its first butterfly valves in 1987. Among them were the Series 20/21, 30/31 and 35/36 resilient-seated valves that are still in its range.
Seven Star LLC is an independent supplier in Muscat. We list Bray valves, actuators, positioners and switch boxes, and supply complete automated valve packages and spare parts to water, oil and gas and process plants in Oman and the GCC.
Bray at a glance
| Established | 23 April 1986, Houston, Texas, by Craig C. Brown and Frank J. Raymond |
|---|---|
| First products | Series 20/21 sanitary and chemical, Series 30/31 general purpose and Series 35/36 large-diameter butterfly valves, first assembled in 1987 |
| Product families | Resilient-seated, high-performance and triple-offset butterfly valves, knife gate and slurry valves, pneumatic and electric actuators, positioners and valve status monitors |
| Applications | Water and wastewater, desalination, HVAC, chemical, oil and gas, power, mining and slurry service |
Bray products we list
| Family | Models | Typical use |
|---|---|---|
| Resilient-seated butterfly valves | Series 20/21, 22/23 PTFE-lined, 30/31, 32/33, 35/36, 3A/3AH | Water, seawater, HVAC and general utility isolation; PTFE-lined for corrosive chemicals |
| High-performance and triple-offset butterfly valves | McCannalok 40/41, Tri Lok | Higher pressure and temperature, steam, hydrocarbons and tight shut-off |
| Knife gate and slurry valves | 740, 755, 941, 762, 765, 767, 768 | Slurries, sludge, pulp, mining tailings and wastewater solids |
| Actuators | Series 92/93 rack and pinion, Series 98 scotch yoke, Series 70 electric | Automating quarter-turn valves with air or electric power |
| Positioners and switch boxes | 6A, 6P, 5A, 5C Ex d, Series 54 sensors | Modulating control and open/closed position feedback to the control system |
The butterfly valve type follows the duty. Resilient-seated valves seal on a rubber liner, which makes them economical and bubble-tight for water and utilities. High-performance valves use an offset disc and a PTFE or metal seat for higher pressures and temperatures. Triple-offset valves add a third geometric offset so the disc meets the seat without rubbing, which allows a metal-to-metal, zero-leakage seal in steam and hydrocarbon service.
Where Bray valves are used
In Oman and the GCC, Bray valves and actuators are used in water transmission and distribution, desalination and wastewater plants, district cooling and HVAC, petrochemical and chemical plants, power stations and mining and slurry lines.
Ordering Bray valves: what we need
Send the series, size (NPS or DN), end connection (wafer, lug or flanged), body, disc and seat materials, and the medium, pressure and temperature. For actuated valves, add the actuator type (double-acting or spring return), air or electric supply, and any positioner or switch box needed.
Facts checked against Bray company history, October 2026.
Browse Bray International products by category: Control Valves.
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Frequently Asked Questions
How does the Bray/Rite double door check valve reduce water hammer?
Two independent springs close the lightweight discs quickly, which Bray says gives non-slam shutoff with reduced water hammer potential.
What sizes are available?
NPS 2 to 12 (DN 50 to 300) in ASME Class 150 flange connection.
What standards apply?
Designed to API 594 and tested to API 598; CE marked to PED 2014/68/EU and CRN registered.
What seat temperatures are printed?
EPDM -50 to 300 deg F; Buna -40 to 250 deg F.
How is the part number built?
XX is the valve size in inches; for example D0415XEZNSF is a 4 inch valve.
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