3700 Series Stainless Steel Ball Valve

Reliable shutoff, full-port flow, and 1000 WOG performance for demanding industrial service.

When your process depends on dependable isolation and long service life, the ThermaFlo Engineering 3700 Series 2-Piece Stainless Steel Ball Valve (TDS-3700BV-26) delivers the rugged performance industrial facilities expect. Built from investment-cast stainless steel and designed to ASME pressure/temperature requirements, this valve combines corrosion resistance, full-port flow capacity, and secure shutoff in a compact two-piece design.

Rated 1000 WOG at 400°F and 150 PSIG steam at 400°F, the 3700 Series is well suited for water, oil, gas, steam, and general process applications across manufacturing, utilities, food processing, chemical handling, and other industrial environments. A blow-out proof stem, reinforced PTFE seats, and PTFE seals and packing help ensure reliable sealing and long-term durability, while the latch-lock handle adds an extra layer of operational safety.

Why engineers choose it

API-598 tested

• Maximizes flow and minimizes pressure drop.Full-port stainless steel design

• Handles demanding water, oil, and gas service conditions.1000 WOG @ 400°F

• Suitable for steam service within the stated rating.150 PSIG steam @ 400°F

• Adds security and confidence in operation.Blow-out proof stem

• Supports tight shutoff and reliable sealing performance.Reinforced PTFE seats & PTFE packing

• Straightforward installation and maintenance.NPT threaded ends to ASME B1.20.1

• Verified quality and seat leakage performance before shipment.API-598 tested and inspected