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

Forged steel fixed ball valve - high-pressure, large-diameter, low-torque, long-life isolation solution

Design concept

The high-pressure boundary is supported by a dense forged steel valve body. The ball is rigidly fixed at the center of the valve body by the upper and lower ear shafts. The medium thrust is directly introduced into the valve body through the ear shafts instead of being pressed downstream to the valve seat. The sealing surface only bears the controllable spring preload force and the additional force of the tiny medium. Core logic: Eliminate casting defects through forging, dissolve high-pressure large-diameter thrust with ear shaft support, achieve low-torque operation and uniform sealing wear, and provide standard isolation components with dense structure, easy operation and balanced service life for high-pressure pipelines of Class 600 and above and large-diameter pipelines of DN80 and above.

Performance advantage

· 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 specification and procurement 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 is equipped with an automatic pressure relief function. When the middle cavity is reheated and pressurized, it slightly opens to the upstream side to release pressure, eliminating the need for an external safety valve.

· 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.

· Intrinsic high density of forged steel: The grain flow lines of the forgings are continuous, the wall thickness is uniform, and the integrity of the pressure boundary under high pressure and alternating loads is better than that of cast steel.

· 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 when the cover loosens.

· 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

· Media: natural gas, crude oil, refined oil products, water, steam, hydrocarbons, media containing solid particles, high-temperature heat transfer oil

· Scenarios: Entry and exit of long-distance pipeline stations, offshore platforms, main process pipelines of refining and chemical plants, high-pressure water supply and steam in power plants, and pulp transportation

· Drive: worm gear, pneumatic, electric, hydraulic