Series M4

Product specifications

Specifications			Test method
Shutoff Rating		Zero Leakage
Body Style		One Piece
Certifications		CRN, PE(S)R, PED, TR CU, TSG, UA TR
Body Materials		A105, A182-F22 Cl. 3, A182-F91/F92
Stem Materials		431 Stainless Steel/QPQ, Inconel® 718
Seat Materials		Inconel® 718 Spray & Fused Chromium Carbide, 410 SS/HVOF Chromium Carbide
Design Standard		Bore sizes per ASME TDP-1, ASME B16.34, PED
Testing Standard		Per Customer Request, API 598, MSS SP-61
Face to Face		Custom Upon Request, Manufacturers Standard
Applications		Isolation or blowdown of steam, water, and other high temperature and/or high pressure clean medias, Power plant steam vents & drains
Temperature Range		Up to 1100°F (593°C)
Ball Materials		410 SS/HVOF Chromium Carbide, Inconel® 718/HVOF Chromium Carbide
Ports		Reduced Port, Special Ports Available, Full Port
End Connections		Butt Weld (ASME B16.25), Flanged & Special, Socket Weld (ASME B16.11)

Product description

Bray® Series M4 severe service ball valves are specifically engineered for isolation in vents and drains applications within the power industry. They are extensively tested to ensure reliable zero-leakage shutoff in high-pressure, high-temperature steam and superheated steam environments, providing maintenance-free performance under the most extreme conditions.

Series M4 valves are ideal for use in conventional coal and combined cycle power plants, nuclear balance-of-plant systems, co-generation, and critical functions such as boiler, feedwater, header, and turbine drains, superheater vents, steam drum vents, sootblower isolation, bypass line isolation, and economizer header drains. They are also suitable for specialized duties, including power-operated relief valves and sky vents.

These valves feature a robust one-piece unibody construction, heavy-duty drivetrain, 360° mate-lapped ball and seat, optional HVOF or spray & fuse hard coatings, and live-loaded packing with Belleville springs. Matching materials and coatings for the ball and seat provide consistent thermal expansion, reducing seat stress and ensuring reliable shutoff in high-cycle service.

Manufactured in Bray’s ISO 9001:2015 certified facility, Series M4 valves offer full material traceability, comply with PED 97/23/EC Annex III, Module H, TSG, CRN, and are optionally available with TDP-1 compliance. In-stock and ready for fast global delivery for maintenance, turnarounds, and new plant construction.