Jd745X Diaphragm Type Multifunctional Water Pump Control Valve

JD745X Diaphragm Multifunctional Water Pump Control Valve Model NO.: JD745X Applicable Temperature: Below 80°C Flange Standard: JIS, ANSI, DIN, JB Test and Inspection Standard: GB/T13927, API598 Application: Outlet of Water Pump Function: Acts as a Non-Return Valve and Prevents Water Hammer Trademark: Goole, OEM, ODM Transport Package: Wooden Case Specification: CE, SGS Origin: Wenzhou, Zhejiang, China HS Code: 8481804090 Product Introduction The JD745X is a high-performance hydraulic control valve designed for water pump systems. It comes in two types: diaphragm and piston, both consisting of a main valve, pilot valve, connecting tubes, and other components. Depending on the application, the system can be configured by adjusting the pipeline assembly of the pilot valve and fittings to achieve different control functions. Structure The valve is available in two structural types: Diaphragm and Piston. Both are composed of key parts such as the body, regulator, pilot tube, filter, and more. Diaphragm Type This version features a diaphragm that controls the flow. Key components include the body, filter, regulator, stem, diaphragm/gland, bonnet, and slow closing disc. Materials used include CI, CS, DCI, NBR, and stainless steel for durability and performance. Piston Type The piston type includes additional components like a spring, main valve disc, seat, and sleeve. The design allows for precise control and improved functionality under varying pressure conditions. Specifications The valve is available in various pressure ratings (PN 1.0, 1.6, 2.5, 4.0 MPa), with corresponding shell and seat test pressures. Minimum operating pressure is 0.07 MPa, and the slow closing time ranges from 3 to 120 seconds. It operates effectively within a temperature range of 0–80°C and is suitable for water applications. Features & Working Performance The valve is designed with a Y-type structure and double-chamber operation. It offers smooth flow, low pressure loss, and stable opening/closing. The diaphragm is made of reinforced nylon rubber for long life, and the sealing gasket is easily removable for maintenance. Working Performance When the valve is open, the medium pushes the main valve disc up, allowing flow through the regulator. When closed, the medium flows into the upper chamber, causing the valve to close quickly or slowly, preventing backflow and reducing water hammer. Main External Dimensions The dimensions vary depending on the nominal diameter (DN). For example, DN 50 has a length of 205 mm, height of 270 mm, and flange dimensions of 150 mm. Larger sizes have proportional increases in dimensions. Assemble Notification It is recommended to install the valve horizontally with the bonnet upwards. Ensure correct flow direction, clean pipelines before installation, and use a strainer to prevent debris from entering the system. In cold environments, insulation is required. Notifications Before operation, check the pilot valve and piping. Ensure the regulator works smoothly and maintain the system regularly. Testing Methods Start the pump, check inlet and outlet pressure, then stop the pump to detect water hammer or reverse flow. Adjust the globe valve if necessary. Malfunction Maintenance If the main valve cannot open, check pressure levels, adjust the stem, ensure the globe valve is open, and clear any blockages. If the valve does not close tightly, inspect the diaphragm, adjust the stem, and check the pressure. Contact Information Ms. Cathy Yongjia Goole Valve Co., Ltd. Heyi Industrial Zone, Oubei, Wenzhou, 325105, China Tel: +86-577-57781015 | Fax: +86-577-67985602 Mob: +86 150 5759 6965 Web: www.chinavalve1.com

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