How to Make Manual Gate Valves Last Longer ?

Apr 16, 2024 | News

Gate valves are critical to regulating fluid flow in many industries, and their efficient operation depends on careful maintenance. This guide describes maintenance methods and techniques for three gate valve categories: large gate valves, manual gate valves, and cast steel gate valves.

Basic introduction to Big Size Gate Valves

Big size gate valves, also called large diameter gate valves, are designed for handling voluminous fluid flows with expansive nominal diameters.These valves are essential in various industries like oil and gas transmission, chemical processing, power generation, water treatment, mining, and infrastructure projects. They handle high flow capacities, pressure thresholds, and large pipe diameters.

Selection & Maintenance


  • Selection Considerations:Working pressure, temperature, fluid properties, flow requirements, and more are considered.
  • Installation & Commissioning: Strict specifications and manufacturer’s guidance are required for the installation of big size gate valves. The valve must be correctly centered, firmly supported, and connections tightly sealed and leak-free. Functional tests and sealing tests are conducted during debugging to confirm that the valve moves flexibly, experiences no jamming, and maintains a good seal.


  1. Visual inspections should routinely be carried out to identify wear, corrosion, or damage on the cast steel gate valve.
  2. Suitable lubricants should be applied to the stem threads and sealing surfaces for friction reduction and smooth operation.
  3. Valve seals should be monitored and replaced as necessary to ensure sealing integrity and leakage prevention.
  4. The valve should be kept clean from debris or contaminants that might affect operation, using proper cleaning agents carefully.
  5. The valve’s functionality should be checked periodically, with issues like sticking or jamming addressed promptly to avoid damage.

Advantages of Manual Gate Valves in International Trade

  • Adaptability to various environments: One of the characteristics of manual gate valves is their adaptability. Regardless of how adverse the conditions may be, these valves maintain their functional integrity, unaffected.
  • Economic feasibility: In terms of cost management, manual gate valves are evidently favored. The initial purchase price of these valves is lower, and there is almost no energy requirement (as they do not need electricity to operate). Therefore, they can help reduce operating costs for businesses – an important consideration factor on the international trade stage.
  • Ease of use and maintenance: The unique thing about manual gate valves is their simplicity.This simplicity ensures that repairs can be quickly carried out in the event of a malfunction, without the need for specialized equipment. Rapid repair turnover is crucial for preventing costly downtime in international trade operations.
  • Independence from power sources: The benefits of valves that can operate without a power source cannot be underestimated. In areas with unstable power supply or frequent power outages, manual gate valves ensure the continuity of operations.
  • Simple operation: Operating manual gate valves does not require extensive training or technical knowledge, making them suitable for a broader workforce. In an international context, this means fewer barriers for personnel interacting with these valves, thus making operations smoother.
  • Long-term reliability: Manual gate valves are praised for their longevity. They are typically made of sturdy materials like cast steel, enduring the test of time and consistently fulfilling their duties.
  • Enhanced security: In an era where digital threats are increasingly pronounced, the manual nature of these valves circumvents vulnerabilities associated with automated systems. Due to the need for physical operation, manual gate valves can effectively prevent network intrusions that might otherwise disrupt trade processes.

manual gate valves

How to Maintain Manual Gate Valves ?

  • Valve handles should be inspected regularly for wear, ensuring smooth operation and secure attachment.
  • The packing gland should be checked and adjusted periodically to prevent stem leakage through proper compression.
  • The valve body and parts should be coated or treated with anti-corrosion substances, especially when exposed to harsh elements.
  • Valve stem and packing should be lubricated to ease operation and reduce friction, using condition-appropriate lubricants.
  • Seals should be replaced when necessary to ensure ongoing sealing effectiveness and to guard against leaks, with material consideration for specific fluid and thermal demands.

Introduction and Repair of Cast Steel Gate Valve

At the heart of industrial fluid control lies the cast steel gate valve, a device synonymous with strength and precision. Built to withstand the rigors of high pressure and temperature variations, these valves are the cornerstone of heavy-duty industrial applications, from steam distribution in power plants to flow control in oil refineries.So how to make cast steel gate valves last longer? The following are some ways to maintain cast steel gate valves to extend their service life:

  1. Valves and their components should be observed for corrosion signs, with protective measures applied to ensure longevity.
  2. Inspections of the valve stem should be conducted regularly, with any abnormalities remedied quickly for uninterrupted functioning.
  3. Integrity checks, in the form of pressure tests, should be periodically undertaken to uncover any sealing flaws or leaks.
  4. To preserve performance, components like seats and discs must be replaced with authentic parts when wear is detected.
  5. Valve operations should be checked consistently, noting and addressing any unusual sounds, vibrations, or resistances.

By adhering to these maintenance guidelines tailored to big size, manual, and cast steel gate valves, industries can ensure the reliability, efficiency, and safety of their fluid control systems, prolonging the lifespan of these critical components and minimizing downtime. Remember, regular maintenance is key to maximizing the performance and longevity of gate valves in industrial operations.