The Series M4 Severe Service ball valves are engineered specifically for Isolation in Vents & Drains Valve applications in the power industry. Series M4 valves are rigorously tested for dependable zero leakage on/off applications in high pressure, high temperature steam and superheated steam. Series M4 Vent & Drain Valves ensure maintenance free operation in the most extreme conditions. Available with Socket Weld, Butt Weld, flanged ends or others on request. Size range: SW or BW from DN 15 to 65; BW from DN 80 to 100. Temperature range: up to 593ºC.
Bray® Series M4 severe service ball valves are ideal for service in conventional coal and combined cycle power generation, Nuclear balance of plant applications, Co-Generation, for boiler drains, feedwater drains, header drains, turbine drains, above and below seat drains, superheater vents and drains, steam drum vents, sootblower isolation, bypass line isolation and economizer header drain applications as well as specialized applications including, power operated pressure relief valves, sky vents and special applications upon request.
Series M4 severe service ball valves are engineered using advanced technology, featuring a 1-piece unibody body construction, with heavy-duty drivetrain, 360° mate-Lapped ball and seat with high velocity oxygen fuel (HVOF) and spray & fuse hard coating options along and live-load packing with Belleville springs. The ball and seats are constructed with the same materials and coatings, ensuring reliable tight shutoff and low seat stress during thermal cycling due to the parts shared thermal expansion rates, ensuring maintenance free operation, even in high-cycle service applications.
Series M4 Valves are manufactured in our ISO 9001:2015 facility with full traceability, including MTR’s, and certified to the requirements of Annex III, Module H of PED 97/23/EC, TSG, CRN and available compliance with TDP-1. M4 products are in stock and available for quick delivery worldwide to support MRO, turnarounds and planned maintenance intervals as wells as new plant construction projects.
A. Utilizing the same material and coating composition for the ball and seat, both parts expand at the same rate during thermal cycling, ensuring reliable tight shutoff. The ball and seat are 360° mate-lapped to create a truly spherical interface, eliminating irregularities found with traditional mate-lapping techniques. Wider sealing surfaces reduce dynamic cycling stresses promoting extended valve life and tight shutoff.
B. Forged heavy walled unibody construction eliminates the body joint and any potential for shell leakage. CNC machined for utmost accuracy. Transitioning angles maximize flow rates.
C. Cast steel bracket with increased thickness for superior rigidity. CNC machined to fully align the body, bracket, and stem, eliminating side to side motion. Permanently attached bracket.
D. High strength one piece stem with upper bearing ring. Ensures proper alignment. Extends valve life and maximizes stem sealing by limiting stem side loading. Prevents stem blow-out.
E. Robust ISO 5211 mounting flange supports direct mounting of high temperature actuators or conventional adaptation for standard actuators.
F. Inconel® 718 Belleville spring exerts continuous force onto the ball and seat maintaining the seal throughout operating temperatures.
G. Set of Inconel® 718 Belleville springs live load the stem packing for low maintenance leak prevention.
H. External body groove effectively dissipates conductive heat during the postweld heat treatment (PWHT) process.
Severe service ball valve − Series M4
The Series M4 Severe Service ball valves are engineered specifically for Isolation in Vents & Drains Valve applications in the power industry. Series M4 valves are rigorously tested for dependable zero leakage on/off applications in high pressure, high temperature steam and superheated steam. Series M4 Vent & Drain Valves ensure maintenance free operation in the most extreme conditions. Available with Socket Weld, Butt Weld, flanged ends or others on request. Size range: SW or BW from DN 15 to 65; BW from DN 80 to 100. Temperature range: up to 593ºC.
Bray® Series M4 severe service ball valves are ideal for service in conventional coal and combined cycle power generation, Nuclear balance of plant applications, Co-Generation, for boiler drains, feedwater drains, header drains, turbine drains, above and below seat drains, superheater vents and drains, steam drum vents, sootblower isolation, bypass line isolation and economizer header drain applications as well as specialized applications including, power operated pressure relief valves, sky vents and special applications upon request.
Series M4 severe service ball valves are engineered using advanced technology, featuring a 1-piece unibody body construction, with heavy-duty drivetrain, 360° mate-Lapped ball and seat with high velocity oxygen fuel (HVOF) and spray & fuse hard coating options along and live-load packing with Belleville springs. The ball and seats are constructed with the same materials and coatings, ensuring reliable tight shutoff and low seat stress during thermal cycling due to the parts shared thermal expansion rates, ensuring maintenance free operation, even in high-cycle service applications.
Series M4 Valves are manufactured in our ISO 9001:2015 facility with full traceability, including MTR’s, and certified to the requirements of Annex III, Module H of PED 97/23/EC, TSG, CRN and available compliance with TDP-1. M4 products are in stock and available for quick delivery worldwide to support MRO, turnarounds and planned maintenance intervals as wells as new plant construction projects.
A. Utilizing the same material and coating composition for the ball and seat, both parts expand at the same rate during thermal cycling, ensuring reliable tight shutoff. The ball and seat are 360° mate-lapped to create a truly spherical interface, eliminating irregularities found with traditional mate-lapping techniques. Wider sealing surfaces reduce dynamic cycling stresses promoting extended valve life and tight shutoff.
B. Forged heavy walled unibody construction eliminates the body joint and any potential for shell leakage. CNC machined for utmost accuracy. Transitioning angles maximize flow rates.
C. Cast steel bracket with increased thickness for superior rigidity. CNC machined to fully align the body, bracket, and stem, eliminating side to side motion. Permanently attached bracket.
D. High strength one piece stem with upper bearing ring. Ensures proper alignment. Extends valve life and maximizes stem sealing by limiting stem side loading. Prevents stem blow-out.
E. Robust ISO 5211 mounting flange supports direct mounting of high temperature actuators or conventional adaptation for standard actuators.
F. Inconel® 718 Belleville spring exerts continuous force onto the ball and seat maintaining the seal throughout operating temperatures.
G. Set of Inconel® 718 Belleville springs live load the stem packing for low maintenance leak prevention.
H. External body groove effectively dissipates conductive heat during the postweld heat treatment (PWHT) process.
