low MOQ Resilient seat Ductile Iron 12 inch Gate valve to en1074 bs5163 with DN1000 PN10 Handbook
THE INDISPENSABLE VALVE
A valve is a product rarely noticed by the average person, yet it plays an important role in the quality of our life. Each time you turn on a water faucet, use your dishwasher, turn on a gas range or step on the accelerator of your car, you operate a valve. Without modern valve systems, there would be no fresh pure water or automatic heat in your home. There would be no public utilities, and beyond wood and coal, almost no energy of any kind. Plastics would be unheard of, as would many inexpensive consumer products.
By definition, a valve is a device that controls the flow of a fluid. Today's valves can control not only the flow, but the rate, the volume, the pressure or the direction of liquids, gases, slurries or dry materials through a pipeline, chute or similar passageway. They can turn on and turn off, regulate, modulate or isolate. They can range in size from a fraction of an inch to as large as 30 feet in diameter and can vary in complexity from a simple brass valve available at the local hardware store to a precision-designed, highly sophisticated coolant system control valve, made of an exotic metal alloy, in a nuclear reactor.
Valves can control flow of all types, from the thinnest gas to highly corrosive chemicals, superheated steam, abrasive slurries, toxic gases and radio active materials. They can handle temperatures from cryogenic region to molten metal, and pressures from high vacuum to thousands of pounds per square inch.
The valve is one of the most basic and indispensable components of our modern technological society. It is essential to virtually all manufacturing processes and every energy production and supply system. Yet it is one of the oldest products known to man, with a history of thousands of years.
HOW TO CHOOSE THE RIGHT GAT VALVE
CHOOSE A GATE VALVE WITH A STURDY AND DURABLE CONSTRUCTION AND AVOID COSTLY REPLACEMENTS.
FIVE OVERALL SELECTION CRITERIA CAN HELP MAKE THE RIGHT DECISION.
1) Wedge design
The wedge is the sealing part of a gate valve and is therefore crucial. onsider the following:
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2) Rubber quality
The rubber quality is critical for the durability as well as for the valve function. The rubber must be able to withstand continuous impact from impurities and chemicals without being damaged and it must be able to absorb small impurities in the seat to close tight. Consider the following:
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3) External corrosion protection
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| The external corrosion protection is critical for the service life of the valve. A uniform and even epoxy coating according to DIN 30677-2 and GSK* requirements is recommended and involves the following:
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4) Tight construction
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| There are two important design issues:
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5) General performance
When operating a gate valve either by handwheel or by means of an electric actuator it is important to pay attention to the operating and closing torque.
- Operating torques : The torque needed to operate the valve from the open position to the closed position, should be between 5 Nm and 30 Nm depending on the valve size. It is important to consider that valves having an operating torque less than 5 Nm encourages the operator of the valve to close the valve to fast thus risking water hammer and pressure surges in the pipeline.
- Closing torques : The torque needed to close the valve to a drop tight position. This torque should for handwheel operated valves be balanced against the handwheel diameter in such a way that it does not present the operator with a rim-force in excess of 30-40 kg. When operating the valve with an electric actuator or manual gearbox the torque should be within the limits of a standard range actuator. It is important to notice that the actuators normally have a torque range that is quite wide, and often it is the ISO flange connection between valve and actuator that determines the actuator choice. As a main rule valves with ISO flange connection should have max. closing torques as stated below:
- ISO flange F-10, maximum 120 Nm
- ISO flange F-14, maximum 500 Nm
- ISO flange F-16, maximum 1000 Nm
- Full bore : To enable the use of pipe cleaning devices the inside diameter of the valves should correspond to the nominal size of the valve.
products range
TopSun offers a comprehensive range of valves and accessories for the water and sewerage industry. Our valves range includes:
*Gate valves, resilient and metal faced DN50-1000
*Non return valves DN80-300
*Flap valves DN80-600
* Air valves
* Fire Hydrants
*Buttefly valves
Our Logistics department will offer:
Superior customer service
Better relationships
Enhanced efficiency
How can I place order?
You can contact us by email about your order details, or place order on line.
How can I pay you?
After you confirm our PI, we will request you to pay. T/T (HSBC bank) and Paypal, Western Union are the most usual ways we are using.
What's the order procedure?
First we discuss order details, production details by email or TM. Then we issue you an PI for your confirmation. You will be requested to do pr -epaid full payment or deposit before we go into production. After we get the deposit, we start to process the order. We usually need 7-15days if we don't have the items in stock. Before production has been finished, we will contact you for shipment details, and the balance payment. After payment has been settled, we start to prepare the shipment for you.
How do you take care when your clients received defective products?
replacement. If there are some defective items, we usually credit to our customer or replace in next shipment.
How do you check all the goods in the production line?
We have spot inspection and finished product inspection. We check the goods when they go into next step production procedure.
Topsun service undertakes to provide you with long-term sustainable technical solutions, permanent innovation and expertise from our specialists.
A sustainable partnership based on trust, Topsun is present beside you.
A: Your inquiry related to our products or prices will be replied in 24 hours.
B: Protection of your sales area, ideas of design and all your private information.
C: Best quality and competitive price.
- Step 1Find your interested products by search keywords
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