Applicable Standards:

Ball Valve Design Standards: API 6D, BS 5351, ASME B16.34

Face-to-Face Dimensions: ASME B16.10, API 6D

Flange Standards: ASME B16.5 / ASME B16.47

Butt-Weld End Standards: ASME B16.25

Fire Safe Testing: API 607, API 6A

Inspection and Testing Standards: API 598, API 6D

Design Features:

Structure: 2-piece or 3-piece body design

High-integrity sealing structure with low operating torque

Double Block and Bleed (DBB) function

Cavity self-relief mechanism

Fire-safe design

Anti-blowout stem

Anti-static design

Locking device (for lever-operated valves)

ISO 5211 actuator mounting pad

Emergency sealant injection function

Application Fields:

Oil & Gas: Wellhead equipment, pipeline pigging stations, storage tank inlets/outlets, oil and natural gas transmission

Chemical Processing: Reactor isolation, toxic media transport, high-pressure process lines

Energy & Power: Power generation, boiler fuel shut-off, main steam line isolation

Special Applications: Subsea pipelines, LNG facilities, strategic reserve depots

Brand: KOZO

Valve Materials: Carbon steel, high-temperature Cr-Mo steel, stainless steel, duplex stainless steel, Monel, aluminum bronze, special alloy steels, etc.

Valve Type: KOZO Ball Valve

Valve Testing: 100% tested prior to delivery

Warranty: 18 months after shipment or 12 months after installation (whichever occurs first)

Valve Structure: Trunnion-mounted ball valve

Size Range: 1/2" to 48"

Pressure Class: ASME Class 150, 300, 600, 900, 1500, 2500

Lead Time: 15 – 30 days

Samples: Samples available upon request from KOZO Valves

Valve Color: Customized according to customer requirements

Packaging: Plywood crates

Minimum Order Quantity (MOQ): 1 set

Country of Origin: Zhejiang, China (Mainland)

Shipping Port: Shanghai or Ningbo

Payment Terms: L/C, D/P, T/T, Western Union

Stainless steel fixed ball valve - A low-torque and long-life isolation solution for corrosive and wide-temperature range working conditions

Design concept

The pressure-bearing shell is made of austenitic stainless steel forgings or castings. The ball is fixed and supported by ear shafts. The medium thrust is introduced into the valve body through the ear shaft instead of being pushed downstream to the valve seat. The sealing surface only bears a controllable spring preload force. Core logic: By leveraging the corrosion resistance and wide temperature range characteristics of stainless steel to cover harsh media, and with ear shaft support to dissipate large-diameter thrust, achieve low-torque operation and uniform sealing wear, it provides standard isolation components with dense structure, easy operation and balanced service life for large-diameter pipelines with corrosive, cryogenic and high-temperature conditions.

Performance advantage

· Wide temperature range application: Austenitic stainless steel has no ductile-brittle transition temperature, maintaining toughness and strength throughout the entire temperature range from -196°C to 538° C. One valve covers deep cold to high temperature.

· Corrosion resistance: F316/CF8M contains molybdenum and is resistant to chloride ion pitting and various acid, alkali and salt chemical media, making it suitable for harsh environments on offshore platforms and in chemical plants.

· Extremely low operating torque: The medium thrust is carried by the ear bearing, and the torque is only 1/3 to 1/5 of that of the floating ball of the same specification, significantly reducing the size and cost of the actuator.

· Bidirectional airtight grade seal: The medium of the downstream valve seat is self-tightened, and the spring of the upstream valve seat is pre-tightened, meeting the API 598 zero-bubble acceptance, with reliable bidirectional disconnection from low pressure to full pressure.

· Cavity pressure self-relief: The upstream valve seat automatically slightly opens to release abnormal pressure rise in the middle cavity, eliminating the need for an external safety valve and ensuring intrinsic safety.

· Uniform sealing wear: The ball is precisely centered and limited by the ear shaft, without eccentric wear. The wear rate of the upstream and downstream valve seats is consistent, and the sealing life is multiplied.

· Full diameter and low flow resistance: The ball holes are the same as the inner diameter of the pipe, with nearly zero pressure loss, and can pass through the pigging device.

Safety performance

· Fireproof structure: Standard equipped with primary non-metallic seal + secondary metallic seal, certified by API 607/6FA, maintaining effective shut-off in case of fire.

· Anti-blowout valve stem: The reverse sealing step design complies with API 608, ensuring that the valve stem is not blown out by the medium when the cover is loosened.

· Anti-static conduction: The resistance of the ball - valve stem - valve body is ≤10Ω.

· Cavity pressure self-relief protection: The upstream valve seat automatically relieves pressure to prevent deformation or rupture of the middle cavity due to pressure build-up.

Applicable working conditions

· Medium: nitric acid, acetic acid, alkaline solution, seawater, LNG, liquid oxygen/liquid nitrogen/liquid argon, media containing chloride ions, high-purity chemicals, food-grade materials

· Scenarios: Main process pipelines of chemical plants, offshore platforms, LNG receiving terminals, air separation units, food and pharmaceutical industries, conventional islands of nuclear power plants

· Drive: worm gear, pneumatic, electric, hydraulic