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 floating ball valve - API/ASME system for medium and small diameter high-pressure dense sealing solution

Design concept

Taking ASTM forged material as the pressure-bearing matrix and API 608 and ASME B16.34 American standard systems as the design criteria, the intrinsic compactness of forged steel is combined with the principle of floating ball pressure self-sealing. The ball is not equipped with a fixed ear shaft. After closing, the medium pressure pushes it towards the downstream valve seat, and the sealing force automatically increases with the pressure difference. 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, achieve reliable bidirectional sealing with the simplest structure, and guarantee full life cycle compliance with the American standard system. Provide economical and standard isolation components for medium and small diameter high-pressure pipelines of Class 150-800 and DN8-200.

Performance advantage

· Pressure self-tightening seal: When closed, the thrust of the medium pushes the ball towards the downstream valve seat. The sealing specific pressure automatically increases with the pressure difference, making the seal more reliable under high-pressure conditions.

· Bidirectional zero leakage: Symmetrical structure, meeting API 598 high-pressure gas seal zero bubble acceptance, reliable bidirectional off from low pressure to full pressure.

· Excellent low-pressure sealing: The elastic sealing ring or pre-tightening spring on the back of the valve seat provides the initial sealing force, enabling airtight shut-off even under extremely low pressure differences.

· Full bore zero pressure loss: The ball hole is the same as the inner diameter of the pipe, with nearly zero flow resistance, allowing it to pass through the pigging machine.

· Intrinsic high density of forged steel: The grain flow lines of forgings are continuous, the wall thickness is uniform, the specific strength is high, and the integrity of the pressure boundary under high-pressure conditions of Class 600 and above is better than that of cast steel.

· Minimalist structure: No ear shafts, bearings or complex piston valve seats. The number of components is approximately 60% of that of fixed balls of the same diameter, making maintenance simple and convenient.

· Small in size and light in weight: Compact surface to surface. For DN50 and below, a single handle can quickly open and close 90° without the need for an actuator.

Safety performance

· Anti-blowout valve stem: Installed from the inside of the valve body, with an inverted sealing step at the bottom. Even when the cover is completely loosened, the valve stem will not be blown out by the medium pressure, meeting the mandatory requirements of API 608.

· Fireproof structure optional: Configurable primary non-metallic seal + graphite secondary seal, certified by API 607/6FA.

· Anti-static electricity conduction: The resistance between the ball, valve stem and valve body is ≤10Ω, and static electricity is conducted away in time.

Note on the pressure in the middle cavity: The liquid trapped in the middle cavity of the floating ball may abnormally increase pressure due to thermal expansion. It is recommended that in situations prone to temperature rise, a ball with a pressure relief hole or an additional middle cavity discharge valve be selected.

Applicable working conditions

· Medium: crude oil, refined oil products, natural gas, water, steam, nitrogen, hydrocarbons, non-corrosive chemical media

· Scenarios: Oil depot receiving and dispatching system, chemical branch pipelines, gas distribution network, steam tracing, metering skid-mounted units, instrument isolation