Оптовая продажа ручка BS5163 DN125 чугунная задвижка для подачи питьевой воды
1 656,06 ₽ - 2 208,08 ₽
Производство TF ищет дистрибьюторов 800 бесшумная вертикальная подъемная осевая обратная задвижка
- Категория: >>>
- Поставщик: Foshan Tangzheng Pipe Fittings Co. Ltd.
Сохранить в закладки 1601259254767:
Описание и отзывы
Характеристики
TF manufacture looking for distributors 800 pornd grade silent vertical lift axial flow check valve drawing
Product Description
A check valve refers to a type of valve with a circular valve disc as the opening and closing component, which acts to block the backflow of the medium by its own weight and medium pressure. It belongs to the category of automatic valves, also known as check valves, one-way valves, reflux valves, or isolation valves. The valve disc movement modes are divided into lifting and swing types. The lifting check valve has a similar structure to a globe valve, except for the valve stem that drives the valve disc. The medium comes from the inlet end (a swing check valve has a valve disc that is inclined and can rotate around the shaft, and its working principle is similar to that of a lift check valve. Check valves are commonly used as bottom valves in pumping devices to prevent water backflow. When used in combination with globe valves, check valves can provide safety isolation. The disadvantage is high resistance and poor sealing when closed.Operational Principle
Check valves can also be used on pipelines that provide supply to auxiliary systems whose pressure may rise above the system pressure. Check valves can be mainly divided into swing check valves (rotating according to the center of gravity) and lift check valves (moving along the axis).
The function of a check valve of this type is to only allow the medium to flow in one direction and prevent flow in the opposite direction. Usually, this type of valve operates automatically, and under the pressure of fluid flowing in one direction, the valve disc opens; When the fluid flows in the opposite direction, the valve seat is cut off by the fluid pressure and the self weight of the valve disc, which acts on the valve seat.
Among them, check valves belong to this type of valve, which includes swing check valves and lift check valves. The swing check valve has a hinge mechanism and a valve disc that is like a door, freely leaning against the inclined valve seat surface. In order to ensure that the valve disc can reach the appropriate position on the valve seat surface every time, the valve disc is designed in a hinge mechanism, so that the valve disc has sufficient swing space and truly and comprehensively contacts the valve seat. The valve disc can be made entirely of metal, or it can be embedded with leather, rubber, or synthetic covering on the metal, depending on the performance requirements. When the swing check valve is fully open, the fluid pressure is almost unobstructed, so the pressure drop through the valve is relatively small. The disc of the lift check valve is located on the sealing surface of the valve seat on the valve body. Except for the valve disc, which can be freely raised and lowered, the rest of the valve is like a globe valve. Fluid pressure lifts the valve disc from the sealing surface of the valve seat, and the medium reflux causes the valve disc to fall back onto the valve seat, cutting off flow. According to the usage conditions, the valve disc can be an all metal structure, or it can be in the form of a rubber pad or rubber ring embedded on the valve disc holder. Like globe valves, the passage of fluid through lift check valves is also narrow, so the pressure drop through lift check valves is greater than that of swing check valves, and the flow rate of swing check valves is limited very little.
The function of a check valve of this type is to only allow the medium to flow in one direction and prevent flow in the opposite direction. Usually, this type of valve operates automatically, and under the pressure of fluid flowing in one direction, the valve disc opens; When the fluid flows in the opposite direction, the valve seat is cut off by the fluid pressure and the self weight of the valve disc, which acts on the valve seat.
Among them, check valves belong to this type of valve, which includes swing check valves and lift check valves. The swing check valve has a hinge mechanism and a valve disc that is like a door, freely leaning against the inclined valve seat surface. In order to ensure that the valve disc can reach the appropriate position on the valve seat surface every time, the valve disc is designed in a hinge mechanism, so that the valve disc has sufficient swing space and truly and comprehensively contacts the valve seat. The valve disc can be made entirely of metal, or it can be embedded with leather, rubber, or synthetic covering on the metal, depending on the performance requirements. When the swing check valve is fully open, the fluid pressure is almost unobstructed, so the pressure drop through the valve is relatively small. The disc of the lift check valve is located on the sealing surface of the valve seat on the valve body. Except for the valve disc, which can be freely raised and lowered, the rest of the valve is like a globe valve. Fluid pressure lifts the valve disc from the sealing surface of the valve seat, and the medium reflux causes the valve disc to fall back onto the valve seat, cutting off flow. According to the usage conditions, the valve disc can be an all metal structure, or it can be in the form of a rubber pad or rubber ring embedded on the valve disc holder. Like globe valves, the passage of fluid through lift check valves is also narrow, so the pressure drop through lift check valves is greater than that of swing check valves, and the flow rate of swing check valves is limited very little.
- About Products
Q1: How is the quality?
A1: Quality is priority. We pay much attention to the quality check. Every product will be fully assembled and carefully tested before it's packed for shipment.
Q2: Do you have a list of your most popular products?
A2: Here is a list of our most popular products.
- About Samples
Q1: Can you provide free Valve samples?
A1: Yes, but the shipping cost needs to be borne by the buyer.
Q2: How much for a sample?
A2: Please tell me the samples and other details you want, and I will quote you as soon as possible.
- About MOQ
Q1: What is your minimum order quantity?
A1: The MOQ for each product is different, so it would be recommended to refer to the detail page of the product you are interested in. If you need further clarification, send me the product link, and I will reply as soon as possible.
- About Customised
Q1: Can I customize products?
A1: Yes. Let me know the specific customization requirements, and I will get back to you as soon as possible.
Q2: Can I customize the logo and packaging?
A2: Yes, we can customize products based on your design and packaging requirements. Please send your detailed requirements to us.
- About Price
Q1: Why is the actual price higher than the price on the website?
A1: The price on the website is for the most basic style and the smallest size, while we will recommend the right product to you according to your actual requirement, which will make the actual product different from the basic style, so the price will be different, and at the same time the bigger the size, the higher the price will be. Each quotation is the best price we have calculated to give.
Q2: What is the price?
A2: For an accurate quote, please provide us with more details like logo or packaging customization requirements, quantity preference, shipping address, etc.
- About Production
Q1: What is the lead time of your products?
A1: It mainly depends on the types of products, quantity, and season. As for most of the products with small quantities, we can deliver them within 15 days while it will take about 30 days for the products with large quantities. In addition, we also have some products in stock. Please feel free to talk with us about the lead time of specific products.
Q2: How long is your production cycle?
A2: The production cycle for each product is different. If you need further clarification, send me the product link with the sizes, quantity and special requirements you need, and I will reply as soon as possible.
- About Payment
Q1: What is your payment term?
A1: We need to collect 30% of the amount as the deposit of the order, and the final payment must be settled before shipment. Payment can be made by T/T, Western Union, PAYPAL, credit card, etc. Acceptable currencies are USD, RMB, EUR, JPY, SGD and HKD, etc. This is negotiable.
Q2: Can I pay the full payment for the goods before they leave the warehouse without paying the deposit?
A2: We need a 30% advance payment as a deposit. If you feel uneasy about this, you can make the payment through Alibaba, which is beneficial for both of us.
- About Shipping
Q1: How can I get accurate quote for different shipping options?
A1 :Please send us your detailed address so that we can provide you with the shipping options and relevant costs.
Q2: What shipping methods can you offer?
A2: There are several shipping options, such as by express (DHL/UPS/FedEx, etc.), by sea, and by land. We suggest to go by sea if you order a big quantity of goods, by land to some Asian and European countries, and by express if you would like to receive your goods as soon as possible. We will discuss with you to offer a best shipping method for you before placing your orders.
Q1: How is the quality?
A1: Quality is priority. We pay much attention to the quality check. Every product will be fully assembled and carefully tested before it's packed for shipment.
Q2: Do you have a list of your most popular products?
A2: Here is a list of our most popular products.
- About Samples
Q1: Can you provide free Valve samples?
A1: Yes, but the shipping cost needs to be borne by the buyer.
Q2: How much for a sample?
A2: Please tell me the samples and other details you want, and I will quote you as soon as possible.
- About MOQ
Q1: What is your minimum order quantity?
A1: The MOQ for each product is different, so it would be recommended to refer to the detail page of the product you are interested in. If you need further clarification, send me the product link, and I will reply as soon as possible.
- About Customised
Q1: Can I customize products?
A1: Yes. Let me know the specific customization requirements, and I will get back to you as soon as possible.
Q2: Can I customize the logo and packaging?
A2: Yes, we can customize products based on your design and packaging requirements. Please send your detailed requirements to us.
- About Price
Q1: Why is the actual price higher than the price on the website?
A1: The price on the website is for the most basic style and the smallest size, while we will recommend the right product to you according to your actual requirement, which will make the actual product different from the basic style, so the price will be different, and at the same time the bigger the size, the higher the price will be. Each quotation is the best price we have calculated to give.
Q2: What is the price?
A2: For an accurate quote, please provide us with more details like logo or packaging customization requirements, quantity preference, shipping address, etc.
- About Production
Q1: What is the lead time of your products?
A1: It mainly depends on the types of products, quantity, and season. As for most of the products with small quantities, we can deliver them within 15 days while it will take about 30 days for the products with large quantities. In addition, we also have some products in stock. Please feel free to talk with us about the lead time of specific products.
Q2: How long is your production cycle?
A2: The production cycle for each product is different. If you need further clarification, send me the product link with the sizes, quantity and special requirements you need, and I will reply as soon as possible.
- About Payment
Q1: What is your payment term?
A1: We need to collect 30% of the amount as the deposit of the order, and the final payment must be settled before shipment. Payment can be made by T/T, Western Union, PAYPAL, credit card, etc. Acceptable currencies are USD, RMB, EUR, JPY, SGD and HKD, etc. This is negotiable.
Q2: Can I pay the full payment for the goods before they leave the warehouse without paying the deposit?
A2: We need a 30% advance payment as a deposit. If you feel uneasy about this, you can make the payment through Alibaba, which is beneficial for both of us.
- About Shipping
Q1: How can I get accurate quote for different shipping options?
A1 :Please send us your detailed address so that we can provide you with the shipping options and relevant costs.
Q2: What shipping methods can you offer?
A2: There are several shipping options, such as by express (DHL/UPS/FedEx, etc.), by sea, and by land. We suggest to go by sea if you order a big quantity of goods, by land to some Asian and European countries, and by express if you would like to receive your goods as soon as possible. We will discuss with you to offer a best shipping method for you before placing your orders.
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