Certified for Zero Leakage in Critical Power Industry Applications

The Series M4 Severe Service Ball Valves are specifically engineered for vent and drain isolation in the power industry, ensuring zero leakage in high-pressure, high-temperature steam and superheated steam applications. Designed for maintenance-free operation, they deliver reliable performance in extreme conditions.

Ideal for use in coal and combined cycle power generation, nuclear balance of plant, co-generation, and a wide range of drain and vent services — including boiler, feedwater, header, turbine, superheater, and economizer applications — as well as bypass isolation, pressure relief, and sky vents.

Constructed with 1-piece unibody design, a heavy-duty drivetrain, and a 360° mate-lapped ball and seat, Series M4 valves feature HVOF or spray & fuse hard coatings and live-load Belleville spring packing. The ball and seat share the same materials and coatings, reducing stress from thermal cycling and ensuring tight shutoff and long service life even in high-cycle conditions.

Manufactured under ISO 9001:2015 standards with full traceability (MTRs), the M4 series meets PED 97/23/EC Annex III Module H, TSG, and CRN requirements, with optional TDP-1 compliance. Valves are available worldwide for both MRO and new construction projects.

Quality & Certification:

- Zero Leakage: No visible or detectable leakage for three minutes or more.

- Certified Facility: ISO 9001:2008 for design and manufacture of severe service valves.

- Full Traceability: All pressure-containing components are fully documented.