Product Knowledge | Basic Information on the JW-LOK BD Series Ball Valves

Release date:

2026-05-22

The BD series ball valve is a high-pressure ball valve manufactured from cold-drawn bar stock, typically offering excellent resistance to high pressure and corrosion. Made primarily of 316 stainless steel, it is widely used in the CNG industry.

The BD series ball valve is a high-pressure ball valve manufactured from cold-drawn bar stock, typically offering excellent resistance to high pressure and corrosion. It is primarily constructed from 316 stainless steel and is widely used in the CNG industry.

Working Principle of BD Series Ball Valves

01. Opening, closing, and control process

Example of BD Series 3-Way Switching Valve Products

Enabled status:

The valve stem is rotated by a handwheel or an optional pneumatic or electric actuator, which in turn drives the floating ball to rotate, aligning the flow passage within the ball with the axis of the valve body’s flow path. This allows the medium to pass through the flow passage smoothly, with extremely low fluid resistance. A two-way valve enables bidirectional flow without requiring distinction between inlet and outlet, simplifying installation and operation.

The three-way switching valve strictly adheres to the flow direction requirement, with Port 1 serving as the inlet and Ports 2 and 3 as the outlets, thereby ensuring orderly fluid flow.

Closed state:

The valve stem is rotated in the reverse direction, aligning the flow passage within the ball perpendicular to the axis of the valve body’s flow path. At this point, the floating ball undergoes a slight displacement under the action of the medium pressure, tightly seating against the valve seat to form a sealing barrier that shuts off the flow. Simultaneously, the medium pressure further presses the ball against the seat, enhancing sealing reliability and ensuring leak‑free operation even under high‑pressure conditions, thereby meeting the product’s stringent high‑pressure sealing requirements.

02. Core Advantages

When the valve seat experiences slight wear during prolonged operation, the floating ball, paired with a disc-spring pre‑load compensation mechanism, can automatically fine‑tune its position under the action of process fluid pressure and the elastic pre‑load of the disc springs. This real‑time adjustment compensates for wear‑induced gaps, ensuring consistently excellent sealing performance without the need for frequent disassembly and maintenance, thereby significantly reducing long‑term operating and maintenance costs—this is the core advantage of the BD series ball valve design.

JW-LOK Product Specifications

JW-LOK Jingwei Valve’s BD series ball valves are manufactured using solid bar stock and undergo integral CNC machining, ensuring robust and reliable quality. The products feature a compact, well‑designed structure, high pressure ratings, and outstanding sealing performance, making them widely suitable for automation instrumentation, hydraulics, pneumatics, and chemical fluid applications. They are also fully compatible with and extensively used in the CNG natural gas industry.

Example of BD Series Two-Way Valve Products

01. Product Features

02. Product Technical Specifications

Technical Specifications
Specifications and dimensions	1/4 to 1, 1/4'' to 1'', or 6 mm to 25 mm
Valve body material	Carbon steel: 20#, A105 bar stock, suitable for non-corrosive service with water, oil products, and common gases. Stainless Steel: Solid stainless steel bars in grades 304 and 316L, widely available and commonly used; resistant to acids and alkalis, and highly corrosion- and rust‑resistant. Special materials: Duplex stainless steel, Hastelloy, and Monel, suitable for highly corrosive environments, seawater, and acidic or alkaline media.
Sealing material	PEEK, PTFE (polytetrafluoroethylene), reinforced PTFE, graphite filler, hard alloy seal
Operating temperature	Soft-seal standard type (PTFE): -40°C to +180°C Hard-sealed/graphite high-temperature version: -40°C to +450°C Low-Temperature-Resistant Custom Model: Compatible with Cryogenic Service Conditions
Maximum working pressure	690 bar (10,000 psig)
Port Type	Metric/Imperial Double-Card Socket Connector Female threads (NPT, British tapered pipe threads, British straight pipe threads) Male threads (NPT, British tapered pipe threads, British straight pipe threads) Male/female tube fittings, welded union fittings, pipe union fittings, and more.