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

Stainless steel floating ball valve - A simple sealing solution for medium and small diameter corrosive and wide temperature range working conditions

Design concept

Austenitic stainless steel forgings or castings are used as pressure-bearing shells, and their ductile-brittle transition temperature and corrosion resistance are utilized to cover harsh media. 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. Core logic: Utilizing stainless steel to withstand corrosion and extreme temperatures, and achieving reliable bidirectional sealing with the simplest floating structure, it provides a standard isolation element with an extremely simple structure and easy maintenance for corrosive, cryogenic and high-purity working conditions with a diameter of DN200 or less.

Performance advantage

· Wide temperature range application: Austenitic stainless steel has no ductile-brittle transition temperature, maintaining toughness and strength throughout the entire temperature range from -196°C to 538° C. One valve covers deep cold to high temperature.

· Corrosion resistance: F316/CF8M contains molybdenum, which is resistant to chloride ion pitting and various acid, alkali and salt chemical media, making it suitable for harsh environments such as chemical engineering and Marine applications.

· 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.

· 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. Maintenance is simple, and it is small in size and light in weight.

Safety performance

· Anti-blowout valve stem: The valve stem is 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 the static electricity of the medium flow is carried 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: nitric acid, acetic acid, alkaline solution, seawater, LNG, liquid oxygen/liquid nitrogen/liquid argon, media containing chloride ions, high-purity chemicals, food-grade materials

· Scenarios: Branch pipelines of chemical plants, instrument pipes of offshore platforms, air separation sampling systems, food and pharmaceutical pipelines, branch pipelines for loading and unloading of LNG tankers, high-purity gas distribution systems

· Drive: Handle, pneumatic, electric

· Selection boundary: For high-pressure large diameters above DN150 or Class 600, it is recommended to upgrade to a stainless steel fixed ball valve