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

Three-piece forged steel welded ball valve

Design concept

Three-piece forged steel structure, with the valve body in the middle section fastened to the welded connecting bodies at both ends by bolts. It is fully welded to the pipeline through butt welding, with no risk of external leakage. The fixed ball structure, with the medium thrust carried by the bearing, features low torque and stable sealing.

Performance advantage

There is no leakage at the welding end - the valve is directly welded to the pipeline, eliminating the leakage points of the flange gasket, making it suitable for buried and difficult-to-inspect pipe sections

Low-torque operation - Fixed ball upper and lower shaft support, torque is not greatly affected by pressure fluctuations, manual operation is effortless, and the drive device specification is small

Double-piston effect valve seat - bidirectional independent sealing, low-pressure spring pre-tightening, high-pressure medium self-tightening, full pressure difference tight shut-off

Self-pressure relief in the valve cavity - When abnormal pressure rises inside the cavity, the valve seat is released to the pipeline side to prevent excessive stress in the valve body

Full bore and low flow resistance - The flow channel is consistent with the inner diameter of the pipe, allowing it to pass through the pigging device with a small pressure drop, meeting the requirements of efficient transportation

Safety and reliability

Fireproof - Valve seat graphite ring, high-temperature maintaining seal, in compliance with API 6FA

Anti-blow-out and anti-static - The valve stem is equipped with an anti-blow-out step and double packing. The conductive spring connects the ball - valve stem - valve body

Application scenarios

Natural gas processing plants, long-distance pipeline shut-off, offshore platforms, chemical plants, gas storage facilities, LNG receiving terminals, high-pressure systems of power plants

Driving mode

It is standard equipped with a worm gear box or handle, and pneumatic, electric or hydraulic actuators are optional. The interface complies with ISO 5211 and can be connected to a safety instrument system