Criswell Valve Automation

D. A. Criswell Sales, Inc.

Valve Automation


ISNetworld Contractor

Actuators — Electric, Pneumatic, Hydraulic, Fail Safe

Combustion Controls — For Boilers, Heaters, Flame Safety

Instrumentation & Control — Level, Temperature, Pressure, Flow


Heat Tracing

Tank Gauging


Safety/Relief Valves

Valve Automation

Industrial Services

Wireless SCADA Solutions


Corporate Office
700 Hwy 60
POB 1056
Canyon, TX 79015
Phone 806-655-9367
Fax 806-655-9460

Sales Office
El Paso, TX
Phone: 915-759-8300
Fax: 915-759-8301

Sales Office
1607 S. Midkiff
Midland, TX 79701
POB 2073
Midland, TX 79702
Phone 432-570-6222
Fax 432-570-6444


Triple Offset Valves

D. A. Criswell Sales Inc Valve Automation

Sales - Field Service & Repair - No Charge Field Survey

New Valve/Actuator Packages - Retrofit & Actuator Upgrades

No Charge Evaluations - Start-up Services - No Risk Installations

Amarillo, El Paso, Lubbock, Midland/Odessa, Perryton, and surrounding Texas areas.

Criswell Sales

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Tri Lok Triple Offset Valves

Tri Lok triple offset valves are inherently fire-safe while offering zero leakage and the ability to change the seats and seal rings with different materials suitable for different service conditions. Standard body and disc materials include stainless steel and carbon steel, while the triple offset valve seat materials are of 321 SS, 316 SS hardened, and 316 SS stellite 21 HVOF. Please inquire for additional materials suitable for specific applications.

Bray McCannalok Triple Offset Valve

Bray/McCannalok Triple Offset Valves

The Bray/McCannalok Tri Lok triple offset valve offers a temperature range of -58°F to 842°F, plus pressure ratings of ASME class 150, 300, and 600.

Designed for light vacuum to high pressure applications, the standard metal-to-metal non-rubbing sealing system produces a quality isolation valve while also reducing maintenance and installation costs, as well as decreasing over all weight.

Triple Offset Valve Seal Rings and Seat

Regardless of flow direction, full shutoff is achieved by the Tri Lok seal rings having uniform peripheral sealing with the seat, thereby offering a non-rubbing metal-to-metal seal that provides minimal torque, zero leakage, and is inherently fire-safe.

Bray/McCannalok Triple Offset Valve Cut-out View

Bray/McCannalok Triple Offset Valve Seal Rings and Seat

Service life and ease of maintenance of the Bray/McCannalock triple offset valves are enhanced through the ability to replace seats and seal rings to match changes of service conditions. Replacement seats and seal rings are available with different materials that are suitable for each application.

Triple Offset Valve Cutout

The Tri Lok triple offset valve offers seats and seal rings that can be replaced onsite without having to replace the whole valve.

In accordance with international standards, the one-piece stem has a blow-out prevention ring positioned above the packing box and outside of the pressure boundary. Also in accordance with API 609, stems are indexed to provide a positive local indication of the disc/seal ring location.

Hysteresis is minimalized with the Tri Lok disc-to-stem connection, that also eliminates external connections and hardware.

Bray McCannalok Triple Offset Valve

Triple Offset Valve Cutout

The stem sealing system (packing gland) eliminates fugitive emissions, and is fully adjustable as well as being field replaceable.

Elongated stem bearings deliver maximum stem support. The bearing seals themselves also minimize admission of media into the journal.

Bray/McCannalok Triple Offset Valve Disc and Stem

The Bray/McCannalok Tri Lok triple offset is the only valve in its class with a splined disc/stem connection. The connection itself provides maximum strength while permitting independent axial movement of the disc, thereby enabling the ring and seat to remain in position without being influenced by pressures and temperatures on the stem itself.

Bray/McCannalok triple offset valve

Bray/McCannalok Triple Offset Valve Disc and Shaft

The internal disc-to-stem connection does not require external retention hardware such as keys and taper pins, thereby preventing inherent failures due to vibration and corrosion. Disassembling the Tri Lok triple offset disc and stem is easily accomplished by merely sliding the shaft from the disc.

Bray Tri Lok is a division of Bray International, Inc.

Call us at 1-800-999-9308 or visit the Bray International website for more information.