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Home / Products / STNC / Pneumatic assistant elements / Hand valve

STNC Pneumatic Hand valve Wholesale

PRODUCT

Wholesale STNC Hand valve Manufacturers

The hand valves mainly include PAKH, PAKB series check valves/with quick-change couplings; PKC series self-sealing quick-change couplings; PKS series high-speed rotary quick-change couplings; YSC/NSE/NSF/NASF series one-way throttle valves; PAS series direct-mount speed control valves; PAS series straight-through speed control valves.
Main features: High-speed rotary quick-change couplings with built-in bearings, free to rotate 360° around the central axis at high speed. Basic material: Copper Maximum operating pressure: 1.0 MPa Suitable for hoses: Nylon and PU standard type with sealant. The surface is nickel plated so that no copper ions are produced.

About Group

PNEUMATIC SYSTEM PROFESSIONAL SOLUTION

Ningbo Sono Manufacturing Co., Ltd. is China Hand valve Manufacturers and Wholesale Pneumatic Hand valve Suppliers, which has a history of 25 years in pneumatic field. Our company has set up Zhejiang provincial research and development center and hired domestic and overseas engineers，we have powerful exploiting capacity, we produce six series of products as following: Air source treatment, Pneumatic control elements, Pneumatic act elements, Air press punch, Pipe fittings and Pneumatic tubes, electricty control cylinder. We have the ability to supply the whole set of pneumatic system. Adopting the international advanced technique and machine equipment, we have passed ISO9001:2015 and got CE, ROHS certifications. And developing actively the market of home and abroad and building a wide sales net and after-sale service system. Satisfactory service to customers.
Meanwhile, we won “National High and New Techno-logy Enterprises”, ” Technology Innovation Model Company” and so on. STNC brand has been Famous Brand in Zhejiang province, STNC products have been regarded as brand products in Zhejiang province, selling well all over the world.

Ningbo Sono Manufacturing Co., Ltd.
Ningbo Sono Manufacturing Co., Ltd.

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Industry Knowledge Extension

Understanding the Fundamentals of Hand Valves

In fluid control systems, hand valves serve as pivotal components, facilitating manual control over the flow of liquids and gases. The fundamental understanding of hand valves begins with an exploration of their intricate design and primary functionalities. At its core, a hand valve comprises a valve body, actuator, and a closure element. The valve body, typically made of materials such as stainless steel or brass, provides the structural foundation, housing the other components. The actuator is the mechanism responsible for initiating the opening and closing of the valve. Hand valves commonly employ manual actuators, such as hand wheels or levers, allowing operators to regulate the flow with precision. The closure element, which can take the form of a gate, globe, ball, or disc, controls the passage of fluids. This section delves into the nuances of each closure type, elucidating their distinct features and optimal applications. Understanding the operational principles of hand valves is paramount. Gate valves, for instance, are suitable for on/off applications but may not be ideal for regulating flow. Globe valves, on the other hand, offer more nuanced control and are often preferred for throttling applications. Ball valves excel in quick shut-off scenarios, while butterfly valves are known for their compact design and efficient control in large pipe diameters.

Types of Hand Valves and Their Applications

The diverse array of hand valves available in the market reflects the need for specialized solutions in various industrial applications. This section conducts a comprehensive examination of gate valves, globe valves, ball valves, and butterfly valves, elucidating their unique characteristics and optimal utilization scenarios.
1.Gate Valves: Known for their straightforward on/off functionality, gate valves are pivotal in applications where a full flow or complete shut-off is required. Commonly used in large-diameter pipelines, gate valves are less suited for precise flow control due to the potential for erosion of the gate and seat surfaces during partial opening.
2.Globe Valves: Characterized by a globe-shaped body, these valves offer superior control over flow rates. Globe valves are well-suited for applications requiring throttling and precise regulation of fluid flow. Their design, however, introduces higher resistance, making them less efficient for applications with high-velocity fluid flow.
3.Ball Valves: Leveraging a spherical closure element, ball valves are renowned for their rapid on/off operation. Their simple design, low torque requirements, and versatility make them suitable for a wide range of applications. They excel in situations demanding minimal pressure drop and are commonly used in both residential and industrial settings.
4.Butterfly Valves: Distinguished by a disc-shaped closure element, butterfly valves are compact, lightweight, and effective in large-diameter pipelines. Their quick operation and relatively low cost make them popular choices for applications where rapid shut-off or control of large flow volumes is essential. However, their suitability for precise throttling may be limited.

Installation and Maintenance Best Practices

The reliable and efficient operation of hand valves hinges on meticulous installation and consistent maintenance practices. 
Installation Procedures: Proper installation of hand valves is foundational to their performance. Key considerations include ensuring that the valve is aligned with the pipeline, confirming the correct orientation of the valve (open or closed), and employing appropriate gaskets and fasteners. 
Maintenance Schedule: Regular maintenance is essential to prevent operational issues, prolong the lifespan of hand valves, and minimize downtime. This section outlines a comprehensive maintenance schedule covering tasks such as lubrication, inspection of seals and gaskets, checking for leaks, and verifying the integrity of the actuator. By implementing a proactive maintenance plan, operators can identify and address potential issues before they escalate, ensuring the continuous and reliable operation of the hand valves.