NHV04

Hydraulic Valve

Flow control valve is a hydraulic automatic valve with pilot operated and adjustable flow rate. By adjusting the pilot valve to control the opening of the main valve

Parameter

○ Nominal diameter: DN50-DN600

○ Nominal pressure: PN10 – PN25

○ Applicable media: Non corrosive liquids such as clean water, circulating cooling water, and fire water

○ Operating temperature: 0 ° C to+120 ° C

○ Connection method: flange connection

○ Valve body material: ductile iron, cast steel, stainless steel

○ Diaphragm/sealing material: NBR, EPDM, Viton

○ Control mode: Pilot operated hydraulic self operated control, no external power or air source required

○ Flow setting range: Depending on the caliber, the adjustable range is 5-5000 m ³/h

○ Control accuracy: ± 5% (under stable operating conditions at the set flow point)

○ Response characteristics: automatic sensing of pressure difference changes, dynamic adjustment of opening to maintain constant flow rate

○ Installation requirements:

Valve front straight pipe section ≥ 5D, valve rear ≥ 3D (ensuring measurement accuracy)

It is necessary to install a Y-shaped filter (mesh size ≥ 40) upstream as a matching device

Horizontal or vertical installation (valve cover facing upwards), not inverted

Performance

○ Multi functional valve with high-precision pilot controlled flow

○ Suitable for pipelines that require control of flow and pressure in water distribution pipes, maintaining the predetermined flow rate unchanged

○ Limit excessive flow to a predetermined value and lower the upstream high pressure appropriately

○ Even if the pressure upstream of the main valve changes, it will not affect the flow downstream of the main valve

○ Utilize relevant pilot valves to minimize energy loss during throttling process

In case of emergency, the flow control valve can completely cut off the flow to avoid losses

○ High control sensitivity, safe and reliable, easy debugging, long service life


Application

○ Measurement and flow restriction control nodes for municipal water supply network zoning

○ Balanced distribution points for cold and hot water flow in each floor branch of high-rise buildings

○ HVAC system terminal equipment prevents overcurrent and ensures hydraulic balance

○ User end constant flow protection device for industrial circulating cooling water system

○ Implement total flow restriction and stable operation at the outlet of the secondary water supply pump station

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