KML Lockable Welded Ball Valve

Design Standards

Design Standard: GB/T 12237Connection Ends: JB/T 79, GB/T 9113, GB/T 12224Face-to-Face Standard: GB/T 13927Inspection & Testing Standard: GB/T 13927

Specifications

Size Range: DN50 ~ DN300 mmPressure Range: PN1.6 ~ PN4.0 MPaOperating Temperature: -40 ℃ ~ +200 ℃

Main Materials

Body: ASTM A53 or equivalent to 20# steelStem: AISI 304 or equivalentBall: AISI 304Stem Seal: VITONStem / Bushing: 304 + PTFESeat Seal: 25% C + PTFE

Applications

Suitable for industrial pipeline applications including district heating networks, wastewater treatment, HVAC systems and other utility pipelines.

Structural Features

The valve consists of body, ball, stem and locking mechanism.The locking mechanism integrates the stem connected to the ball, fitted with spring, pawl and ratchet lock cap.Once the ball position is set and the ratchet cap is secured, the valve cannot be re-opened by the end user.

With its locking function, the valve enables on/off control for individual households in heating and water supply systems.It cannot be opened without deliberate damage, allowing effective and secure flow control.

Operation Types

Various types of valve actuators are available: manual, pneumatic, electric, hydraulic, gas-hydraulic, etc.Specific models are selected according to the operating torque of the valve.