Factory Direct Sale Ductile Iron Flow Control Valve

• Temperature: Less Than or Equal to 80 Degrees
• Certification: GS, RoHS, CE, ISO9001, Acs
• Media: Gas, Oil, Water
• Standard: BS, ANSI,En, ISO, GB
• Connection Mode: Flange
• Power: Hydraulic
• Model NO.: HA003
• Material: Ductile Iron,Stainless Steel,Cast Steel
• Type: Single Seater
• Color: Customized
• Transport Package: Export Standard Package
• Specification: DN40-DN600
• Trademark: huhang
• Origin: China

Product Description

1. Product Overview
       The HA003-4X-10/16Q type is a self-regulating valve that utilizes the pressure difference across an orifice plate to restrict or regulate the flow after the valve. The set outlet flow is not affected by changes in the inlet flow or pressure. The set flow refers to the maximum flow restricted by the valve outlet, so it can also be referred to as a flow control valve. When the upstream water supply flow is less than the set value, the main valve is fully open, and the valve does not increase the flow. When the downstream pressure is greater than the upstream pressure, the main valve automatically closes to prevent backflow.
       The commonly used P values (d/D) for orifice plates are typically between 0.5 to 0.6. In small-hole orifice plates, there is significant head loss. This patent optimizes the design by increasing the B value to 0.8 (i.e., d=0.8D). This reduces the flow velocity at the throttling point, resulting in a reduction of approximately 50% in head loss.
2. Technical Parameters
       The flange connection complies with the GB/T 17241.6 standard, and the strength and sealing tests are conducted according to GB/T 13927. The main technical parameters of the tests are provided in Table 1 below, the main component materials are detailed in Table 2 below, and the external appearance is illustrated in Figure 1 below.
3. Operating Principle
       1)Opening and closing principle
       The orifice plate 1 is installed at the inlet of the main valve (see Figure 2). Through the adjustment of the pressure difference (ΔP) at the two locations of the large hole with a diameter of D and the small hole with a diameter of d in the orifice plate by the pilot valve 5, the pressure in the upper control chamber of the main valve diaphragm is changed. This drives the upward and downward movement of the main valve diaphragm and valve disc, altering the opening of the main valve to meet the flow set downstream. The lower control chamber is connected to the downstream through a fixed hole, ensuring the smooth opening and closing of the main valve.
When the flow is less than the set value, ΔP decreases, the pressure in the upper control chamber of the diaphragm decreases, the valve opening increases, and the flow increases to the set value. Conversely, when the flow is greater than the set value, the process works in the opposite manner.
       2)Automatic Check Valve Principle
       When the pressure after the valve is greater than the pressure before the valve, the check valve 4 closes (see Figure 2). The pressure water after the valve passes through the check valve 9 and the ball valve. It is timely injected into the upper control chamber of the diaphragm through the control pipeline D, causing the main valve to automatically close slowly.
 4. Main Characteristics
       1)Energy-saving, more than 50% energy saving
       Because the typical P values (D/d) of orifice plates are typically between 0.5 to 0.6, using an orifice plate for pressure tapping results in significant head loss at the small hole throttling point. This patent can raise the P value to 0.8 (i.e., d=0.8D).
       2)Not affected by fluctuations in upstream conditions and principles
       3)The main valve opens automatically
       When the water supply capacity is less than the set flow due to changes in conditions, the flow does not increase, and the main valve remains fully open.
      4)Wide adjustment range
      Table 3: Dimensions of external connections
5. Typical Installation Schematic Diagram


Quality and inspection:
       Regular check on production line at each working procedure, and one special inspector inspecting the goods in random during the period time of production.regular performance check on finished goods.        
Production step:
       1.The raw materials are cast or forged and processed into semi-finished products.
       2.Processing the semi-products in works shop
       3.Assembling the goods
       4.Testing the sealing in pressure and checking quality of the goods
       5.Package
       6.Delivery the goods on time
Package:
        1.The pakage standard:inside PVC bag and small box and standard export carton
        2.If you have any special requirements pakage,we can pakage as per your artworks.
Primary Competitive Advantages:
       1) We have several years of experience in manufacturing various types of valves professionally.
       2) Products are of good quality, with reasonable prices.
       3) Our style:Promise must be kept and action must be prompt and fruitful.

Certifications

 

       Our business idea:All for customers and everything from innovation.The size standards can be customized according to your specific requirements. Please feel free to contact us for more details.