The key factors to consider when selecting a gate valve
Table of Contents
Gate valves are an important part of busy modern life, as they control the flow of water, gas and other materials in homes, industrial sites and even entire cities. That’s why it’s vital to choose high-quality gate valves and ensure their durability and efficiency. The selection of materials, design and manufacturing process all require careful consideration and precise balance. The discussion that follows will detail some of the key factors in selecting a durable gate valve, including the choice of materials, the importance of stem design, key elements in gate valve design, valve seals and their durability, and the importance of anti-corrosion coatings. In addition, we will look at anti-corrosion coatings for gate valves and the significance of choosing an environmentally sustainable gate valve manufacturer such as JHY Group. These are all critical factors that affect the performance and longevity of gate valves. By considering these factors holistically, we can ensure that the gate valve selected will last and operate at optimum performance and efficiency.
01 Key Considerations in Material Selection for Durable Gate Valves
Gate valves play a fundamental role in our daily lives, from controlling the flow of water in our homes to managing the passage of oil, gas, and other materials in industrial settings. It is therefore critical to assure their durability and efficiency, largely dependent on the material used in the creation of these gate valves.
In this regard, JHY’s GGG40/50 ductile iron stands out. This top-quality material is cast in JHY’s own foundry, ensuring complete control over the process and the quality of the final product. The said material stands up to rigorous industry standards such as EN-GJS-400-15 or EN-GJS-500-7, emphasizing its premium quality. Moreover, the GGG40/50 ductile iron shows a spheroidization rate of over 96%. This rate indicates an impressive capacity to deform under tensile stress without rupturing, making GGG40/50 a notable choice for the gate valve body material due to its resilience.
Available in two grades, GGG40 and GGG50, this type of ductile iron is celebrated for its high strength, elasticity, and durability. Its ability to elongate without breaking allows GGG40/50 to deliver extraordinary resilience, reducing the likelihood of cracking or other forms of damage significantly.
Despite the high ductility and strength of GGG40/50 ductile iron, its tensile strength is relatively lower. This necessitates an increase in the thickness of the valve body to enhance the valve’s strength and durability. When the valve bears the pressure of the internal fluid, the additional thickness more effectively disperses the pressure, mitigating the risk of deformation or rupture due to excessive pressure. However, increasing the thickness also augments the weight of the valve, which could pose an inconvenience in situations where lightweight equipment is a requirement. Therefore, when selecting gate valve materials, it’s crucial to consider a holistic view of aspects such as the operating environment, working pressure, weight constraints, and others to accomplish optimal design.
02 Evaluating Spindle Material: Balancing Strength and Efficiency
The duplex stainless steel spindle plays a pivotal role in ensuring smooth operation. Its unique properties provide a high degree of corrosion resistance and exceptional strength, contributing to its ability to enhance performance stability and efficiency. Moreover, the one-piece design of the JHY spindle makes it far more resilient to axial load than its counterparts. This characteristic ensures that it can effectively bear and balance high operation torques, thereby guaranteeing prolonged service life and optimal performance even under strenuous operational conditions. This design innovation, coupled with the use of highly durable materials, is what sets JHY products apart, offering you improved reliability and exceptional value.
03 Key Aspects of Gate Valve Design: Wedge, Wedge Guides, and Wedge Nut
In the heart of a gate valve lies the gate, often referred to as the wedge. The health of this component is integral to the longevity of the valve; any deterioration significantly reduces the valve’s overall life span. Addressing this concern, our design introduces a free wedge nut, which imparts two key advantages – reduction in stem bending forces, thereby enhancing the valve’s structural integrity, and ease of replacement, simplifying maintenance procedures. This thoughtful design thus ensures a longer, efficient life cycle for the vital gate valve component.
O-ring
A gate valve O-ring refers to a circular rubber sealing ring typically made of materials such as nitrile, Viton, or EPDM. It is used to create a tight seal between the gate and the valve body, preventing any leakage when the valve is closed.
Gland
The gate valve gland is an important component of a gate valve that helps to provide a secure seal around the stem and prevent leakage. It is typically located at the top of the valve body and encloses the stem.
Stem
The stem is made of Stainless steel .When the valve handle or actuator is turned or rotated, it causes the stem to move up or down, which in turn raises or lowers the gate. This movement of the gate allows for the flow to be either shut off completely or allowed to pass through the valve.
Wedge Disc
The disc is shaped like a wedge, hence the name.When the gate valve is in the fully open position, the wedge disc is raised completely out of the fluid or gas flow path, allowing unrestricted flow. When the valve is closed, the disc is brought down to seal against the valve seat, preventing any flow through the valve.
Coating
≥ 250μm FBE coating, WRAS approved,safe and non-toxic.
Plastic seal
SS bolts used to seoure bonnet to valve body are further protected with plastic seal to provide extra sealing and protection.
Full bore design
Full bore design with flat and smooth surface,better protecting for rubber seat,longer valve life service.
04 Selecting the Right Rubber Discs and O-Rings: A Matter of Resistance and Durability
Newly introduced rubber discs, precision-machined and encapsulated by Jhy-self, ensure reduced operating torque under high-pressure conditions, resulting in increased durability and efficiency of gate valves. Excellent sealing is achieved by placing O-rings in the cap. These O-rings prevent leakage and maintain functionality under a wide range of conditions.JHY’s gate valves combine innovation with practicality to ensure long-lasting durability and reliable performance throughout the product’s life cycle.
05 Understanding the Importance of Anti-Corrosion Coatings: The Role of DACROMET® or GEOMET® Coatings
The inclusion of bolts and nuts sanctioned by DACROMET® or GEOMET® greatly enhances the anti-corrosion capabilities of the assembly, thus ensuring greater stability in its structure. DACROMET® and GEOMET® are renowned for their superior and long-lasting treatment processes against corrosive forces.
These specially formulated coatings induce a highly durable, metallic gray layer on the bolts and nuts. This unique coating not only exceptionally resists corrosion but also proficiently endures high-temperature environments and mechanical damage while facilitating immaculate torquing properties. Resultantly, the entire assembly exhibits remarkable stability and an extended lifetime, substantially reducing maintenance frequency and cost-effectiveness.
Thus, the integration of DACROMET® or GEOMET® approved bolts and nuts secure the stability and longevity of the product, thereby significantly augmenting its overall performance.
06 The Ecological Footprint: An Important Factor in Selecting Your Gate Valve Manufacturer
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