Medium-Duty Lockable Gate Valve

A Medium-Duty Lockable Gate Valve is a robust flow control device engineered for reliable on/off service in pressurized piping systems. Its primary function is to provide complete isolation of fluid flow—either water, oil, or gas—by raising or lowering a solid gate across the flow path. The defining feature is an integrated locking mechanism, often a padlock provision or a lockable handle housing, which secures the valve in either the open or closed position. This prevents unauthorized or accidental operation, ensuring system integrity, safety, and precise flow management. It is a critical component for maintenance, safety protocols, and controlled access in various installations.

Product Feature and Application

The medium-duty lockable gate valve is designed for reliable on/off control in water and general fluid systems. It features a robust body, smooth gate operation, and a lockable handwheel that prevents unauthorized operation and ensures safety. With good sealing performance and low flow resistance when fully open, it is widely used in water supply networks, HVAC systems, industrial pipelines, and building services where controlled access and dependable isolation are required.

Product Parameter

Technical Specification

Nominal Pressure: 1.6 MPa

Working Media: Water, Oil, Non‑corrosive and Non‑flammable Gases

Operating Temperature: -10 °C ≤ T ≤ 120 °C

Thread conforms to ISO 228 standard

Product Dimension

Installation Guidelines

1.Clean and prepare the piping system thoroughly before installing the valve.

2.Before installation, remove any protective end caps and inspect the valve ports and seating surfaces to ensure they are clean.

3.Provide adequate support for the valve to avoid stress from connecting piping.

4.Confirm that the valve’s pressure and temperature ratings are suitable for the intended service conditions.

5.Before placing the valve into service, cycle it fully from open to closed to verify smooth operation.

6.After installation, check that the packing nut is properly tightened.

7.For Medium-Duty Lockable Gate Valves, it is recommended to install with the stem vertical and the operating handle on top.

Operating Instructions

Gate valves are manually operated. Turn the handle counterclockwise to open and clockwise to close.

Inspection and Maintenance

1.Routine inspection and preventive maintenance are generally not required, aside from occasional adjustment of stem packing and periodic cycling of the valve from open to closed.

2.If a packing leak occurs, tighten the packing nut clockwise by about a quarter-turn—or until leakage stops—to increase sealing pressure on the stem packing. Never repack a valve while it is under system pressure.

3.When replacing the valve stem, also replace the packing material.

Replacement Parts

Under normal operating conditions, replacement parts are seldom needed. Recommended spare parts for each valve type include: Handle, handle nut, packing, gland, packing nut.

When ordering parts, please provide the valve’s figure number, size, required part, and approximate age.