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

Structural features

Fixed ball ear shaft support: The ball is rigidly fixed to the center of the valve body by the upper and lower ear shafts. The medium thrust is introduced into the valve body through the ear shafts, and the sealing surface only bears a controllable spring preload force.

Stainless steel valve body: Made of A182 forging or A351 casting, it features a fully open flow channel with a smooth inner wall and extremely low flow resistance.

Piston effect valve seat: The medium in the downstream valve seat is self-tightened, while the spring in the upstream valve seat is pre-tightened and can automatically release pressure.

Performance advantage

Wide temperature range application: Austenitic stainless steel has no ductile-brittle transition temperature and maintains toughness and strength throughout the entire temperature range from -196°C to 538°C.

Corrosion resistance: F316/CF8M contains molybdenum and is resistant to chloride ion pitting corrosion and chemical medium corrosion.

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. The actuator specification is small.

Bidirectional zero leakage: Meets API 598 zero-bubble acceptance, with reliable bidirectional shutdown 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, ensuring intrinsic safety.

Uniform sealing wear: The ball is precisely centered without uneven wear, and the service life of the valve seat is multiplied.

Safety performance

Fireproof structure: Standard equipped with primary non-metallic seal + secondary metallic seal, API 607/6FA certification.

Anti-blowout valve stem: Inverted sealing step, meeting API 608.

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

Cavity pressure self-relief: The upstream valve seat automatically relieves pressure to prevent pressure build-up in the middle cavity.

Applicable working conditions

Medium: Nitric acid, acetic acid, alkaline solution, seawater, LNG, liquid oxygen/liquid nitrogen, media containing chloride ions, high-purity chemicals

Scene: Chemical plants, offshore platforms, LNG receiving terminals, air separation units, food and pharmaceutical industries, nuclear power conventional islands