Bolted Bonnet Forged Gate Valve – OS&Y, Flat/Conical Seal, Full/Conventional Port - TEJI

The Bolted Bonnet Forged Gate Valve by TEJI is a high-integrity forged steel valve engineered for shut-off applications in demanding industrial environments such as oil and gas, steam, and high-temperature boiler systems. Designed with a bolted bonnet construction, this valve allows for straightforward assembly and maintenance, making it ideal for systems requiring routine service or inspection.

This gate valve operates with a disc moving linearly and perpendicular to the flow, ensuring minimal flow resistance when open and reliable shut-off when closed. It is available with either flat or conical sealing surfaces, offering versatility for different sealing requirements. The Outside Screw and Yoke (OS&Y) design allows clear visual indication of valve position and isolates the stem threads from the fluid for improved reliability.

The valve incorporates advanced sealing components, including a two-piece self-aligning packing gland and a graphite spiral wound gasket, ensuring excellent performance under high pressure and temperature. End connections are available in Socket Weld (SW) per ASME B16.11 and Threaded Ends (NPT) per ANSI/ASME B1.20.1 for secure, leak-free installations.

Specifications:

– Valve Type: Forged Steel Gate Valve – Bolted Bonnet
– Size Range: 1/2” to 2” (custom sizes available)
– Pressure Rating: Class 150 to 800LB
– Body Materials: ASTM A105, F11, F22, F304, F316, LF2, etc.
– End Connections:
 • Socket Weld (ASME B16.11)
 • Threaded NPT (ANSI/ASME B1.20.1)
– Design Standards: API 602, ASME B16.34
– Face-to-Face: As per API 602
– Leak Testing: API 598
– Stem Design: Outside Screw and Yoke (OS&Y), rising stem
– Port Options: Full Port or Conventional Port
– Packing Gland: Two-piece self-aligning with graphite sealing
– Bonnet Type: Bolted Bonnet with captured spiral wound graphite gasket
– Backseat Feature: Integral backseat for added stem sealing
– Sealing Surface: Flat or conical, metal-to-metal contact
– Temperature Range: -29°C to 425°C (material dependent)
– Operation: Handwheel (standard), Gear, Electric (optional)

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