pressure safety valve ,hydraulic control valve

Product Information
Customer Reviews

Product Details

We are confident about the exquisite details of valve manufacturer.Mike Valve provides diversified choices for customers. valve manufacturer is available in a wide range of types and styles, in good quality and in reasonable price.

Enterprise Strength

Mike Valve runs the business in good faith and strives to provide thoughtful and quality services for customers and to achieve mutual benefit with them.

Company Advantages
1. The whole production of Mech Valve hydraulic control valve is carried out by skillful, experienced professionals.
2. hydraulic control valve produced by our advanced technology guarantees the long lifespan of pressure safety valve .
3. Owing to its wade range of application, the product has won many praises from customers.

Statement

SK730X Pressure Relief & Sustaining Valve is a diaphragm type of hydraulic control valve driven by the hydraulic pressure within the piping system. One prominent feature of the valve is, it can serve as pressure relief valve and sustaining valve at the same time. As pressure relief valve, it releases the high pressure before the valve out of the piping system for protection of the pipes and the equipments when the pressure exceeds its pre-set value; As pressure sustaining valve, it maintains the water pressure above certain set value for guarantee of water supply to upstream area.

Features

◔Operational principle

SK730X Pressure Relief & Sustaining Valve is controlled by pressure relief/sustaining pilot valve and equipped with pressure relief/sustaining pilot valve, needle valve, mini strainer and ball valve, etc.

As Pressure relief valve, the valve is connected with branch pipe and directed to lower pressure area or drainage ditch. In normal working conditions, water ﬂow enters the upper cavity room (2) through needle valve (1). When the pressure before the pilot valve (3) is lower than its pre-set value A, the pilot valve will remain closed and the water that enters the upper cavity room drives the membrane down and closes the disc and the basic valve. The pilot valve opens when the pressure before the valve exceeds its pre-set value and the pressure accumulated in the upper cavity room gets released. Under the pressure from the inlet opening, the disc of the basic valve opens. In this way the pressure within the piping system will be maintained under the pre-set value A.

As pressure sustaining valve, the valve is connected in series with the main pipe and serves to maintain the pressure before valve above the set value B. Under normal conditions, water ﬂow comes continuously from the inlet opening to the upper cavity room (2) of the basic valve through the needle valve (1); When the pressure before the pilot valve (3) is lower than its pre-set value, the pilot valve will remain closed and the water that enters the upper cavity room drives the membrane down and closes the disc and the basic valve for accumulation of pressure till equals to the set value B. The pilot valve opens when the pressure before the valve exceeds its pre-set value and the pressure accumulated in the upper cavity room gets released. Under the pressure from the inlet opening, the disc of the basic valve opens to allow water ﬂow. In this way the pressure within the piping system will be maintained under the pre-set value B.

◔ 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.

SK730X

Notes for installation and debugging

• All the Pressure Reducing Valves have been finished initial debugging tests before delivery. Further dubugging test is also suggested during using according to different working conditions. After the pipe system becomes stable, please loose the adjusting screw on the top of pilot valve to the top- most position.

After the pipe system becomes stable, please loose the lock nut under adjusting screw, open the ball valve or needle valve (1) slightly, when pressurize, adjust the adjust screw on pressure relief pilot valve and fasten the lock nut when it achieves pressure required. Pay attention that when adjust pressure relief pilot valve, clockwise is for increasing pressure and anti-clockwise is for reducing pressure.

Basic Parameters

Pressure	Symbol	Unit	Norminal Pressure
			PN10	PN16	PN25
Set Pressure	Ps	MPa	≤0.83	≤1.33	≤1.7
Set Pressure Difference			Ps＜0.5: ±0.014 MPa; Ps≥0.5: ±3%Ps
Open/Close Pressure Difference	ΔPb		Ps＜0.3: 0.06MPa; Ps≥0.3: 20%Ps
Discharge pressure	Pd		≤1.2Ps

Typical installation illustration

Common problems and proposed solutions

Common Problems

Proposed Solutions

The pressure of pipe system is lower than set-pressure, the valve dose not close.

a.Check if any sundries on the sealing surface of basic valve or pilot valve.

b.Check if any damage on the sealing surface of basic valve or pilot valve.

c.Check if any damage or fatigue on spring of basic valve or pilot valve.

d.Check if any damage or fatigue on diaphragm of basic valve or pilot valve.

The pressure of pipe system is higher than set-pressure, the valve dose not open.

1.Check if ball valve (4) is closed, if yes, please open it.

2.Check if any blocks in basic valve or on stem of pilot valve, if yes, please remove the block or change new stem.

3.Check if lock nut and adjust screw were adjusted wrongly, please try to repeat all the actions.

Company Features
1. Shenzhen Mech Valve Trading Co., Ltd. occupies a leading position in China's hydraulic control valve production.
2. In addition, Shenzhen Mech Valve Trading Co., Ltd. has a complete product line and strong production and testing capability.
3. Following the principle of pressure safety valve , Mech Valve will create more environment-friendly products. Call now! Implementing the strategic position of hydraulic pressure reducing valve , Mech Valve works hard to build a comprehensive large-scale enterprise. Call now! The integration of pressure regulator valve and adjustable pressure relief valve will boost the development of Mech Valve. Call now! Our hope is to open the remote float control valve market with our reliable hydraulic relief valve and excellent adjustable pressure reducing valve . Call now!

Favorable rate

100%

Buyer impression