The Professional Pressure Seal Bonnet Gate Valves provided by TianYu PSB Gate Valves are adopted for high pressure service. Compared to Bolted Bonnet (BB) valve, which the body flange and bonnet flange are joined by studs and nuts, when the system pressure increases, the potential for leakage through the body/Bonnet joint also increases, the unique structure of the pressure seal Bonnet gate valves is that the body-Bonnet joints seals improves as the internal pressure in the gate valve increases, the higher the internal pressure, the greater the sealing force.
TIANYU pressure seal gate valves are available in size ranges from 2 inches to 24 inches, and pressure classes from Class 600 to Class 2500 LB.
Pressure Seal Gate valves Features
TIANYU’s Cast Steel Pressure Seal Gate Valves with dual designs, Stellite®6 hardfacing, self-sealing bonnet, Class 4500 rating, resist thermal stress for harsh industrial use.
Size Range: 2″ thru 24″
Pressure Class: 600-4500
Style: Flexible Wedge and Parallel Slide design
Materials: A216 WCB, WC6, WC9, C5, C12, C12A, CF8M and special alloys
Cast Steel Pressure Seal Gate valves (PSB Gate Valves) in Buttweld and Flanged end connections.
Cast Steel Pressure Seal Gate valves in Buttweld and Flanged end connections.The flexible wedge is a one-piece, fully guided cast wedge with a central hub to allow the seating faces to move relative to each other, thus compensating for distortion of the body seats due to thermal expansion or piping loads. Seat ring and wedge seating face are set at a 9° angle from vertical to minimize sliding contact of the wedge and seat ring during opening and closing.
Wedging actions help effect a tight seal in low differential pressure services. Flexible wedge construction resists wedge sticking or binding in services where the valve may be closed when cold and opened when hot. Seating surfaces are hardfaced with Stellite®6 to provide high life cycle capability in very high differential pressure services.
The gate is a split design using two discs spring loaded and held together by a gate holder with a corrosion reservior spring to provide initial energizing when closed. The gate relies for seat tightness on the primary fluid pressure acting on the downstream seat. There is no wedging action or extra loading on the seats resulting in considerably lower operating torque. During closing there is a bevel on the bottom of the gate to guide it in between the seats and recompress the spring. Seating surfaces are hardfaced with Stellite®6 to provide high cycle capability in very high differential pressure services.
Design standard: API 600, ASME B16.34, GB/T 12234, JB/T3595.
The valve self-sealing type bonnet.
The disc wedging phenomenon is not liable to be caused when temperature rises.
Flexible wedge.
Full stellite overlay seat sealing surface
Full wedge guiding design.
Absolute bonnet joint leak proof.
Optional by-pass design.
A pressure seal gate valve is designed to provide a tight seal under high-pressure conditions, ensuring reliable performance in critical applications. The valve features a unique sealing mechanism where the pressure applied to the valve body increases the seal’s effectiveness, making it ideal for high-pressure and high-temperature environments such as oil and gas, power generation, and chemical processing. Constructed from robust materials like forged steel, pressure seal gate valves offer excellent durability and resistance to extreme conditions. Their advanced design reduces the risk of leaks, enhances system safety, and minimizes maintenance needs, making them a crucial component for reliable flow control and operational efficiency.
I. Testing: The Last Line of Defense for Industrial Safety (1) Accident Warnings: Catastrophes from Millimeter-Level Errors 2022 North American Refinery Explosion: A gate valve internal leakage caused by missing API 598 seal testing triggered an oil-gas explosion, resulting in $240 million in direct economic losses. LNG Terminal Liquid Ammonia Leakage: A cryogenic valve failed […]
Cast Steel Pressure Seal Gate Valves with buttweld/flanged ends (2″–24″, Class 600–4500) offer flexible wedge (one-piece guided, 9° Stellite®6 seats for thermal compensation) and parallel slide (spring-loaded split disc, fluid-pressure sealing, low torque) designs. Materials include A216 WCB/WC6/WC9. Features: self-sealing bonnet, anti-stick wedge, high-cycle Stellite®6 surfaces, API 600/ASME-compliant.
Our products and services comply with international standards and specifications to make sure that we only produce the best and highest quality products and services to our clients.
We offer tailor-made industrial valves to ensure that our product fits your application standards and demand. TIANYU is ISO, API, MSS, and ASME compliant to guarantee you the highest product quality.
As a business partner, TIANYU makes sure that we commit to our clients’ requested deadline because we very much understand the importance of adhering to the timeline required.
TIANYU’s service does not end once our industrial ball valves are being delivered. Also, we offer warranties and provide customer service to our clients as part of our quality service.
Tianyu Professional China Valve Manufacturers and Supplier Conforming ISO APl CE certification standards
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Founded in 2009, Wenzhou Tianyu Valve Technology Co., Ltd. is a professional valve enterprise integrating design, development, production, and sales services, located in the hometown of Chinese valves – Oubei Town, Wenzhou.
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