Ball valves are quarter-turn valves that use a precision-engineered spherical disc to control the flow of liquids or gases. They feature quick operation, tight sealing, and minimal pressure loss, making them ideal for use in oil & gas, petrochemical, power generation, water treatment, marine, and food processing industries. Available in various designs such as floating, trunnion-mounted, V-type, three-piece, and top-entry, our valves ensure smooth operation, excellent sealing performance, and long service life even in demanding industrial environments.
Key Features & Advantages
• Ultra-low flow resistance: Full-bore design with Cv values close to straight pipe flow.
• Fast operation: Only 90° rotation to fully open or close.
• High sealing reliability: Zero-leakage design tested to API 598 / ISO 5208 Rate A.
• Wide working range: Pressure up to PN420 / Class 2500, temperature from -196°C to +550°C.
• Long service life: Soft or metal seats ensuring 100,000+ operation cycles.
• Compact and lightweight: Up to 30% smaller than gate valves of the same rating.
• Fire-safe & anti-static: Certified to API 607 / API 6FA standards.
| Item | Details |
| Main Products | Butterfly Valve / Ball Valve / Gate Valve / Globe Valve / Check Valve |
| Business Type Supported | OEM, ODM, distributors, agents, wholesalers, engineering companies, project contractors |
| MOQ | 1-100 units |
| Customization Options | Trademarks, materials, colors, pressure ratings, flange standards, packaging options, etc. |
| Application Industries | Water supply and drainage, petroleum, chemical, power, gas, HVAC, irrigation, papermaking, pharmaceuticals, new energy |
| Lead Time | 30-60 days (after contract signing and deposit receipt) |
| Quality Standards | API/CE/ISO/WRAS/EAC/customer standards available |
| Sample Policy | Test samples available |
| Payment Methods | T/T (30% deposit, balance before shipment)/LC negotiable |
| After-Sales Service | 12-month warranty, online technical support |
A typical ball valve consists of the following core components:
Valve body: The primary pressure-bearing component, forming the flow path for the media and the cavity where the ball is mounted. Available in one-piece, two-piece, and three-piece configurations.
Ball: The core opening and closing element, typically a hollow sphere with a central circular hole. Its surface is typically hardened with treatments such as chrome plating and spray welding to enhance wear and corrosion resistance.
Valve seat (seal ring): The key component that forms a seal with the ball. The material used determines the valve’s applicable temperature and media.
Soft seals: PTFE, RPTFE, PPL, Nylon, rubber, etc. Offer good sealing properties but limited temperature resistance.
Hard seals: Metal (stainless steel, Stellite) or ceramic. Offer high temperature and wear resistance, but relatively poor sealing properties.
Valve stem: The transmission component that transmits the operating mechanism’s torque to the ball. Typically, a blowout prevention mechanism is designed.
Stuffing box: Located where the valve stem extends from the valve body, it consists of packing, a packing gland, and other components to prevent media leakage from the stem. Operating mechanism: includes handle, gearbox, electric/pneumatic/hydraulic actuator, etc.
Thrust bearing/bottom bearing: Used to secure the ball valve, bears the weight of the ball and valve stem, and media pressure, reducing operating torque.
The following key factors should be considered when selecting a ball valve:
1. Construction Type:
DN ≤ 150, PN ≤ 40: Floating ball valves are preferred for their economical performance.
DN ≥ 200 or high-pressure applications: A fixed ball valve must be selected to ensure operating torque and tightness.
If adjustment is required: A V-shaped ball valve should be selected.
If high-service maintenance requirements are required: A top-entry ball valve should be selected.
2. Seat Material (determines temperature and media compatibility):
Normal temperature, general media (water, gas, oil): PTFE (-20°C to 180°C).
High temperature or wear resistance: Metal seal (PPL up to 300°C, all-metal up to over 550°C).
Severe corrosion: Fluorine-lined ball valves (FEP/PFA/PTFE lining) or all-alloy ball valves.
Ultra-low temperature (LNG): Cryogenically treated PTFE or metal seals.
3. Pressure Rating and Valve Body Material:
Low pressure: Cast iron, ductile iron. Medium and high pressure: Cast steel (WCB).
Ultra-high pressure, severe service conditions: Forged steel (A105).
Corrosive environments: Stainless steel (CF8/CF8M).
4. Connection methods:
Threaded/Quick-fit: Small diameters, instrumentation, and food industries.
Flange: Universal connection method, easy disassembly.
Butt welding: High pressure, high temperature, permanent installation, no risk of leakage.
Wafer: Space and weight savings.
5. Special functional requirements:
Fire safety: Select a fireproof ball valve that meets API 607/API 6FA standards.
Anti-static: Ensure electrical conductivity between the valve stem and ball.
Lockout: Where locking the open/closed state is required.
Tianjin Dingliu valve Industry Co., Ltd. is a high-tech enterprise specializing in the valve and automation industry.
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