Gate valves are fundamental components widely used across various industries, including plumbing, water distribution, fire protection, sewage systems, and industrial applications. If you’re new to gate valves or looking to deepen your knowledge, this comprehensive guide will cover everything from basics to buying tips, emphasizing prominent brands like Duvalco, AVK, VAG, TEK, and JK, particularly in the Malaysian market.
A gate valve is a mechanical device designed primarily to start or stop fluid flow through pipes. The valve works by raising or lowering a gate or wedge, which is placed perpendicular to the fluid flow. Gate valves are highly effective in providing tight shut-off and are generally preferred for systems requiring minimal pressure drop when fully open.
Gate valve installation in Malaysia
The working principle of a gate valve involves a gate that moves vertically within the valve body. When the valve is opened, the gate retracts into the upper part of the valve, providing a clear, unobstructed path for the fluid. When closed, the gate fully blocks the path, preventing fluid flow.
Gate valves are extensively used in various sectors including:
Gate valves come in different types, each suited for specific applications:
These valves feature a rubber-coated wedge for a tight seal and are typically used in water supply, sewage, and irrigation systems due to their leak-proof design and durability.
Designed for higher temperature and pressure environments, metal-seated valves provide a robust sealing mechanism using metal-to-metal contact. Common in industrial applications involving harsh conditions.
The stem moves upward as the valve opens, providing a clear visual indication of the valve's position. Ideal for above-ground installations.
The stem does not rise during operation, making them suitable for underground installations or limited space scenarios.
What is a gate valve used for?
A gate valve is used to start or stop the flow of fluid in a pipeline. It is commonly installed in water, oil, and gas systems where a straight-line flow with minimal restriction is needed. Gate valves are ideal for applications requiring a full open or full close operation.
What are the types of gate valve in Malaysia?
In Malaysia, the most common types of gate valves include resilient seated gate valves for water supply systems, metal seated gate valves for high-temperature or industrial use, rising stem and non-rising stem models depending on space constraints, and knife gate valves for handling slurry or wastewater in industrial settings.
Why use a gate valve instead of a ball valve?
A gate valve is generally preferred over a ball valve in systems with large-diameter pipelines due to its lower cost and better flow efficiency when fully opened. While ball valves offer quicker shut-off and are more suitable for frequent operation, gate valves are better for applications that require infrequent use and minimal pressure drop.
What materials are gate valves made from?
Gate valves are typically manufactured using materials such as cast iron or ductile iron for the body, stainless steel or bronze for the internal components like the wedge and stem, and EPDM or NBR rubber for sealing elements, especially in valves used for potable water applications.
What is the difference between gate valve, stopcock, and ball valve?
A gate valve controls flow by lifting or lowering a gate inside the valve body and is used mainly for full open or closed operation. A stopcock is usually found in residential plumbing and is used to regulate or shut off water supply to a household. A ball valve, on the other hand, uses a rotating ball to control flow and is known for its quick shut-off capability and ease of use.
Is gate valve accredited under SPAN in Malaysia?
Yes, many gate valves available in Malaysia are accredited under SPAN (Suruhanjaya Perkhidmatan Air Negara), meaning they meet the required standards for use in public water supply systems and are approved for compliance with Malaysian water quality and safety regulations.
What are reliable gate valve brands in Malaysia?
Reliable gate valve brands commonly available in Malaysia include DUVALCO, AVK, VAG, Tozen, and various JIS-compliant manufacturers from Japan, Korea, and China. These brands are known for their performance, durability, and SPAN-approved quality for use in water and industrial applications.
Who are gate valve suppliers in Malaysia?
Several trusted gate valve suppliers operate in Malaysia, including Heap Wah Barakah Sdn Bhd. They offer a wide range of gate valve products for residential, commercial, and industrial needs and have been in the Gate Valve supplies industry for over 50 years in Malaysia and South East Asia.
This product has multiple variants. The options may be chosen on the product page
This product has multiple variants. The options may be chosen on the product page
This product has multiple variants. The options may be chosen on the product page
This product has multiple variants. The options may be chosen on the product page
This product has multiple variants. The options may be chosen on the product page
This product has multiple variants. The options may be chosen on the product page
This product has multiple variants. The options may be chosen on the product page
ABOUT HEAP WAH BARAKAH
Heap Wah Enterprise Sdn Bhd (formerly known as Syarikat Heap Wah Enterprise, registered in 1978 as a partnership concern) was formally converted to a private limited company on 22nd June 1984. Its initial capital of RM20,000.00 has now grown over the years to RM1,000,000.00 with a net worth of over RM50,000,000.00 as at to date.
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