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Help CenterEMS Pn16 Hydraulic Control Slow Closing Check Valve
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Description
The slow closing check valve is composed of the main valve and the control pipeline of the hydraulic control valve, and the closing time of the main valve can be adjusted.It is installed at the outlet of the water pump of the building water supply system. It is mainly used to prevent the backflow of the medium and can effectively reduce the impact and noise of the water hammer.
Core Technology & Operational Advantages:
Dual-Disc Closure Mechanism: Features two spring-loaded stainless steel discs that progressively decelerate flow before complete sealing, preventing sudden pressure spikes that cause water hammer.
Adjustable Closing Speed: Integrated hydraulic damping system allows fine-tuning of closure timing (3-60 seconds) to match specific pipeline requirements through external adjustment screw.
Zero-Leakage Performance: NBR-sealed discs maintain bubble-tight shut-off even at low pressures (0.05 MPa minimum operating pressure).
Maintenance-Friendly Design: Top-access cover plate enables disc replacement and seal inspection without pipe disassembly, reducing downtime by up to 70%.
Operating principle
The slow closing check valve is composed of the main valve and control pipeline of the hydraulic control valve and is installed at the outlet of the water pump of the building water supply system.When the pump is open, the water flow gives upward thrust to the disc of the main valve, and the upper chamber of the main valve drains out to open the main valve. The opening time of the main valve can be controlled by adjusting the opening size of the ball valve on the control pipe.When the pump is closed, the upward thrust at the disc disappears, and the water flows back to fill the cavity of the main valve, so that the main valve is closed. By adjusting the opening of the ball valve on the control pipe, the closing time of the main valve can be controlled.
System Protection Benefits:
Reduces pipe stress by up to 90% compared to conventional check valves
Extends pump lifespan through controlled deceleration during power failures
Prevents backflow without requiring external power sources
Minimizes water column separation in hilly terrains
Trusted Implementation:
Manufactured at our Shanghai facility equipped with CNC machining centers and hydrostatic testing stations, every S300x valve undergoes rigorous 1.5x pressure testing. Our engineering team provides complimentary system analysis for optimal valve selection and positioning within your network. With over 15 years of specialized valve production, Shanghai Sote Valve supplies critical infrastructure projects across 30 countries where reliable water hammer prevention is non-negotiable.
FAQs:
Q: Can this valve be installed vertically?
A: Horizontal installation is standard. For vertical orientation, consult our engineers for specific flow direction requirements.
Q: What maintenance is required?
A: Annual visual inspection and quarterly closure timing verification are recommended. Seal replacement intervals vary by water quality.
Q: Does it work with variable speed pumps?
A: Yes, the adjustable closing mechanism accommodates different pump shutdown profiles.
Q: Can you provide corrosion-resistant versions?
A: Optional epoxy coating or full stainless steel construction is available for aggressive environments.
Q: What is the delivery lead time?
A: Standard sizes (DN50-DN300) ship within 15 days; larger diameters require 25-30 days.
Q: How do I adjust closing speed?
A: Turn the external adjustment screw clockwise to slow closure; counterclockwise for faster closing. Field calibration instructions included.
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