Company Advantages
1. The smooth operation of adjustable pressure reducing valve ensures the effective use of pressure relief valve . Its design cuts down the damage of cavitation
2. This product is designed to fit into any space without taking up too much area. People could save their decoration costs through its space-saving design. Its ability to keep pressure stability avoids vibration and noise
3. The product operates stably and reliably. It can withstand running fatigue and is not easily affected by other operations of appliances. It can be furnished with different types of internal trim and seals to accommodate varied service media
4. The product features overvoltage protection. The test results show that it has the circuit protection function under overvoltage conditions, withstanding a certain overvoltage range. It is less prone to have scale build-up after long-term use
5. It has the desired colorfastness. The type of the dye, the amount of dye, its method of bonding to the fabric and dyeing procedures all contribute to this characteristic. The particles in the fluid are not prone to stick to it due to its internal sheathing

SK745X Pump Control Valve is a diaphragm type of hydraulic control valve driven by the hydraulic pressure within the piping system, widely applied in the pump outlet for prevention of medium back-flow, pressure fluctuation and water hammer formation. Under normal working conditions, pressure before the valve is higher than pressure after, and the valve remains fully open. When pressure after valve exceeds pressure before valve, the valve is capable to be closed rapidly to prevent backflow of water and protect the pump and piping system. The design of the valve incorporates the function of slow-opening, quick closing, slow closing and water hammer absorption, no large pressure fluctuation within the system.

Pressure from the header is directed to the bonnet of the Closing Speed Control, keeping the main valve closed if there is no flow through the two pilot valves. When one of the pilot valves opens and there is more flow out of the bonnet than is coming in, the main valve opens.

◔Operational principle

SK745X Pump Control Valve is composed of mini strainer and ball valve, etc.

Before the pump starts, there is no pressure before the valve, and disc (5) is closed under the pressure from the spring. With the start of the pump, the pressure before the valve increases gradually. At the same time, the pressure water enters the lower cavity room (2) through the ball valve (1). The two combined force opens the disc of the basic valve rapidly to allow water supply. When the pump stops (as planned or out of accident), pressure before the valve suddenly declines. Pressure after valve exceeds that before the valve. As a result, the higher pressure flows back to the upper cavity room through the ball valve (4) and gets accumulated to drive the membrane down to close the valve disc (5). The pressure within the lower cavity room (2) discharges to the lower pressure area before the basic valve through ball valve (1), which slows down the closing process to prevent formation of water hammer.

The opening and closing speed of the valve can be controlled by adjustment of the ball valve(1) & (4). For this valve, there is also another option with dual disc design, especially good for working in complicated piping system and working conditions where there is tremendous pressure and water back-flow.

◔ Property and advantages

• Driven by pressure of pipe system, work automatically with energy of pipe system to achieve energy conservation and environment protection.

• Controlled by the pilot valve, lower energy consumption, achieve accurate pressure reducing results, have function of stabilizing pressure after the valve.

• Dual cavity design, with functions of fully opening and fully closing. Slow shut causes no pressure fluctuation, and the diaphragm with support is well protected.

• Have internal orifice, connect bottom cavity and outlet of the basic valve, make sure stability of reaction to keep stability of pressure after the valve, avoid any vibration and noise.

• Channel with straight-flow, slight friction loss, no eddy flow and turbulent flow, cut down the damage of cavitation.

• Long pitch orientation design for stem move, stable and no gap resistance.

• Balanced automatically, big gap design on connection of disc and stem, disc is free on the vertical flat against stem, it can balance the tolerance from machining and sealing surface. Good connection without leakage. Achieve functions of both reducing dynamic pressure and reducing static pressure.

• Ductile iron castings with nodularity higher than 90%, foundry in house with advanced melting technology and strict quality control system, testing reports and testing bars can be supplied with order. Records and testing bars maintained for one year in the factory.

• Good corrosion resistance, with stainless steel, copper alloy, rubber made from DuPont and other rust- resisting material, fusion bonded epoxy coating both for interior and exterior surface of the basic valve. All the characteristics in accordance with ANSI/AWWA C550 and other international specifications like WRAS, NSF61.

Company Features
1. Over the years, Shenzhen Mech Valve Trading Co., Ltd. has been active in the design and production of adjustable pressure reducing valve . And we are regarded as one of the most powerful manufacturers in the industry. With sale channels expanded in overseas markets, we can see a significant increase in our customer number. This gives us the confidence to go ahead and compete in international markets.
2. We have a strong manager that leads and develop our manufacturing department. He/She is responsible for overseeing the management of all areas of manufacturing, ensuring that products are manufactured on schedule, within quality standards, and cost objectives.
3. Over the years, we have expanded new market channels in many countries. This has contributed to the accumulation of a large number of customers and increased overseas sales volume. We have an ambitious goal: to be a key player in this industry within several years. We will continually enlarge our customer base and increase customer satisfaction rate, hence, we can improve ourself by these strategies.