Threaded shut-off valve

1. Structure and principle of operation
● Main components: valve body, valve cover, gate, valve stem, handwheel (or actuator), seal.

● Working principle: When turning the handwheel, the valve stem makes the gate move up and down to achieve full opening or full closing of the fluid (the gate is perpendicular to the direction of the liquid).

● Fully open state: Low fluid resistance and low pressure loss.

● Fully Closed State: Good sealing, can completely shut off the flow of medium.

2. Connection Method
● Threaded connection:

Internal Thread: The valve body has a thread inside that matches the external thread of the pipe.

Male Thread: The valve body has a thread on the outside that matches the internal thread of the pipe.

● Common thread standards:

G Thread (BSPP, British Pipe Thread)

NPT Thread (American Tapered Pipe Thread)

Metric thread (e.g. M thread)

3. Applicable Environments and Industries
● Applicable Media: Non-corrosive or slightly corrosive liquids, such as water, steam, oil, gas, etc.

● Applicable Industries:

● Construction: Water & Drainage, Heating, Ventilation, and Air Conditioning (HVAC)

● Industry: Petroleum, Chemical, Pharmaceutical, Food

● Fire Protection: Fire Pipe System

4. Pickpoints
● Diameter (DN): Common DN15~DN50 (Small Diameter).

● Pressure level (PN): PN10, PN16 (low pressure system).

● Temperature range: selectable according to the sealing material (rubber ≤80°C, PTFE ≤200°C).

● Thread Standard: Must match the pipeline (such as G thread or NPT thread).