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

American standard forged steel fixed ball valve - API/ASME system high-pressure large-diameter dense isolation solution

Design concept

Taking ASTM forged material as the pressure-bearing matrix and API 6D and ASME B16.34 American standard systems as the design criteria, the intrinsic density of forged steel is integrated with the fixed ball ear shaft support structure. The sphere is rigidly fixed to 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, and the sealing surface only bears the controllable spring preload force. The valve body is forged to obtain continuous grain flow lines, eliminating the risk of shrinkage porosity and gas holes in castings. Core logic: Ensure the integrity of high-pressure boundaries through forging, dissolve large-diameter thrust with ear shaft support and achieve low-torque operation, and ensure full life cycle compliance with the American standard system in a closed loop. Provide standardized long-life isolation solutions for high-pressure pipelines of Class 600 and above and large-diameter pipelines of DN50 and above.

Performance advantage

· Class series temperature and pressure system: Strictly follow the temperature and pressure curve in ASME B16.34 Appendix. The allowable working pressure for each temperature under the given material and Class grade is clearly limited to prevent the misuse of over-temperature and over-pressure.

· 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 specification and procurement cost of the actuator.

· Bidirectional airtight grade seal: The downstream valve seat medium is self-tightened, and the upstream valve seat spring is pre-tightened, meeting the API 598 high-pressure gas seal zero bubble acceptance, and 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 uneven wear. The service life of the upstream and downstream valve seats is balanced, and the sealing performance remains stable throughout its entire life cycle.

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

· Full diameter and low flow resistance: The ball hole is consistent with the inner diameter of the pipe, with nearly zero pressure loss. It can pass through a pigging device to meet the inspection requirements inside the pipeline.

Safety performance

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

· Anti-blowout valve stem: The reverse sealing step design meets the mandatory requirements of API 608. Even when the cover is completely loosened, the valve stem will not be blown out by the medium pressure.

· Anti-static conduction: The conductive path between the ball, valve stem and valve body has a resistance of ≤10Ω, which can promptly conduct away the static electricity flowing in the medium.

· 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.

· Low dissipation optional: Live load disc spring packing box continuous compensation, upgradable to ISO 15848 Class A certification, suitable for toxic and hazardous media.

Applicable working conditions

· Medium: natural gas, crude oil, refined oil products, water, steam, hydrocarbons, medium and low-temperature chemical media, media containing solid particles

· Scenarios: Entry and exit of long-distance pipeline stations, offshore platforms, high-pressure piping systems in refining and chemical plants, high-pressure water supply and steam in power plants, hydrogenation units, and safety shut-off at wellheads