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1.Product Overview
Introducing the ZYC Self-Operated Differential Pressure Control Valve, a marvel of engineering excellence. This state-of-the-art valve, also known as a pressure controller, functions independently without any need for external power sources. It dynamically adjusts to fluctuations in the medium's pressure, ensuring that any residual pressure or waves in the pipeline are effortlessly stabilized. By maintaining a consistent pressure differential between the inlet and outlet, it guarantees seamless system stability.
Ideal for both sub-metering and automatic control systems, the valve showcases efficiency and precision.
2. Product Characteristics
Designed with a sophisticated double disc structure, this valve features minimal valve stem unbalance force and a compact form. It is perfectly suited for heating and air conditioning water systems to maintain a constant pressure differential, and it boasts the following standout characteristics:
1) Constantly maintains the controlled system pressure difference to ensure optimal performance.
2) Supports internal self-regulation of the system, effectively neutralizing the impact of external network pressure fluctuations on the controlled environment.
3) Equipped with advanced technology diaphragm, it operates with zero theoretical error and can withstand substantial pressure differences up to 0.8MPa.
4) Featuring a cutting-edge stepless pressure regulation structure, the valve offers an adjustable control pressure difference with an impressive range of up to 25:1.
5) Even in the absence of independent adjustments within the controlled system, the valve functions as a self-operating flow control mechanism. The flow setting can be achieved by:
a. Adjusting and controlling the pressure difference size.
b. Modifying the resistance within the controlled system.
6) Possessing an effective blockage elimination feature, the valve fully opens under maximum control pressure difference, allowing medium pressure to clear any debris obstructing the double valve disc. This is achieved by closing the ball valve at the end of the pressure guide pipe for 3-5 minutes.
7) Ensures precision with a control pressure difference accuracy of ±5%.
3. Working Principle of the Self-Operated Pressure Differential Control Valve
Typically installed on the user inlet return water pipe, the pressure difference control valve connects its pressure guide pipe to the inlet water supply pipe. Here, P1 denotes the water supply pressure, P2 represents the return water pressure inside the valve, and P3 signifies the return water pressure outside the valve.
Upon setting the pressure difference △Pi (APi-P1-P2) within the valve, the lower membrane chamber's pressure P1 balances with the thrust from P2 and the spring's compression deformation. This equilibrium determines the flow cross-sectional area A and the fluid's flow coefficient in the valve. Any changes in flow rate prompt shifts in these forces, adjusting the flow cross-sectional area A and the valve's flow coefficient while maintaining a constant △Pi.
With known fluid properties, pipe diameter, and flow resistance coefficient, the single pipe resistance calculation formula is approximated as:
P=Kqm2
△P ---- Total pipeline resistance;
K ----- Pipeline impedance;
qm ---- Traffic
The formula illustrates that pipeline resistance is directly proportional to the quadratic mass flow rate and pipeline impedance. Variations in flow rate alter the pressure P2 in the upper membrane chamber, prompting the spool to adjust and modulate A and the flow coefficient to manage the system's total resistance, thus ensuring △Pi remains stable.
4. Pressure Difference Control Valve Technical Parameter Table
5. Material and Structure Drawing of Main Parts6. Main Outline and Connection Dimensions
7. Installation and Debugging
1) Ensure the medium's flow direction aligns perfectly with the arrow marked on the valve body, ensuring optimal performance;
2) Position the pressure difference control valve strategically on the return pipe. Connect one end of the valve to the pressure guide pipe, and attach the other end seamlessly to the water supply pipe. It's highly recommended to install a 1/2" ball valve at the water supply end of the pressure guide pipe, to effortlessly activate the blockage elimination feature;
3) A reliable filter should be fitted on the water supply pipe, just before the pressure guide pipe, to prevent the valve from losing its automatic adjustment capabilities due to poor water quality;
4) Equip the water supply and return pipes before the valve with pressure gauges, simplifying the process of adjusting and controlling the pressure difference;
5) Should the system's flow be excessively high or significantly low, debris might be obstructing the valve plug during pipeline installation. Closing the 1/2" ball valve for 3-5 minutes may automatically clear light blockages. Persistent issues necessitate disassembling the valve for a thorough inspection and removal of obstructions;
6) Control pressure difference adjustment method: turn the pressure regulating valve stem counterclockwise. Monitor the pressure gauge as the pressure difference reduces by 0.01MPa, incrementally increasing the control pressure difference from the set 0.02MPa to 0.03MPa, and so forth;
7) The valve functions optimally at a working pressure difference of 0.02-03.03MPa. If the pressure difference exceeds 0.3MPa post-installation, a manual control valve should be fixed on the water supply pipe to modulate the pressure difference between the supply and return water pipes at the heat inlet device. Otherwise, the pressure difference valve may only operate under minimal opening, generating noise and significantly shortening the valve's lifespan.
8. Installation Adjustment for Self-operated Differential Pressure Regulating valve systems, ensuring balance and precision.
Huhang Technology Group Co., Ltd. stands proudly as a pioneer in multi-specialty supply, boasting an impressive legacy of over two decades in the industry. Strategically nestled in the vibrant region of Fujian, China, our operations span across five state-of-the-art manufacturing facilities, strategically dispersed throughout the nation: 1 in Shandong, 1 in the bustling hub of Shanghai, and 3 expertly managed sites in Fujian. Our forte lies in the exportation of premier water and drainage valves, precision-engineered brass HVAC valves, robust fire hydrants, state-of-the-art extinguishers, and cutting-edge firefighting equipment. It is our unwavering commitment to unparalleled quality and exemplary after-sales service that truly differentiates us in the competitive landscape.
Supply Ability: 50,000 Meters/Day - Unmatched Capacity!
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