About Flowseal®

Flowseal® butterfly valves define high performance.

Soft Seat, Fire Flow®, Metal Seat, and Mil-Spec valves up to 48" in pressure classes 150, 300 and 600, wafer or lugged style that include double dead end service capability.

Worldwide Valve Supplier

As a leading distributor of Flowseal® valves, let our decades of experience help you locate the exact products you need—from receiving a timely quote to immediate shipping.

We Distribute These Flowseal® Products & More!


Butterfly Valves

Flowseal® High Performance Butterfly Valves


Flowseal® High Performance Butterfly Valves are a standard in many industries including heating, ventilating and air conditioning, power generation, hydrocarbon processing, water and waste water treatment, and marine and commercial shipbuilding.

Our products are also installed in applications as diverse as food and beverage processing, snowmaking and pulp and paper production. Configurations are available for harsh conditions as well as applications requiring nominal pressure and temperature ratings.


Butterfly Valves

Flowseal® MS Triple Offset Butterfly Valves


For the harsh conditions of critical process applications, steam isolation, high cycle frequency and temperature extremes, the Flowseal® MS triple-offset, metal-seated valve offers unmatched performance, reliability and quality.


Size: 3" to 24" (DN 80-600)
Class: 150-600 (PN 10-100)
Materials: Carbon steel, stainless steel, high alloys
Body Types: Lug, Double Flange - Short Pattern, Double Flange - Long Pattern
Temperature Range: -320°F to +1000°F (-196°C to +550°C)
Fire Tested: API 607 Rev. 4

Petro-Valve, Inc
3801 Yale St. Ste. E
Houston, TX 77018
(713) 676-1212