LZ700X Ductile Iron Water Pump Control Valve

Group Hydraulic control valve
Min. Order 1 piece
Terms of Payment all
Update Time 2017-06-13
Item specifics
Nominal Pressure1.0/1.6/2.5MPa
Shell Test Pressure1.5/2.4/3.75MPa
Seal Test Pressure1.1/1.76/2.75MPa
Suitable MediumWater
Medium Temperature0-80℃
  • Description
  • Product review

Brief Introduction

LZ700X pump control valve is composed of main valve, needle valve, solenoid valve, ball valve, single way check valve, travel switch and tube system with pressure gauge. This valve is installed at the pump exit of  for high-rise building water supply system or other water supply system, to avoid medium flow back. When pump is ready to stop, valve will be 90% closed quickly, to avoid water hammer and water slamming noise. When pump is completely stopped, valve will be 10% closed by the  water from pump, to avoid pump water back flow, protect the pump safety. Precisely controlled by solenoid valve. It is safe and reliable,  with long service life and easy to install and repair. No other device needed. Solenoid valve could be 220V AC or 24V DC.


Working Principle


When pump is working and valve supplies water to downstream, solenoid valve is fully opened, needle valve is adjusted to suitable open degree, water from upstream flows to control room via needle valve, single way check valve, flows out via solenoid valve, pressure in control room will open main valve with suitable open degree, to ensure the water supply to downstream.


When pump stopped working, solenoid valve is closed firstly, control room stopped water draining, control room pressure rises, main valve started to close. When valve is 90% closed, travel switch on main valve will give a signal to stop valve, pump will stop working. And at this time, water from downstream will go into control room via single way check valve, control room pressure rises, main valve will be closed




Parameters


Nominal

Pressure

Shell Test

Pressure

Seal Test

Pressure

Solenoid Valve

Suitable

Medium

Medium

Temperature

1.0 MPa

1.5 MPa

1.1 MPa

220V AC/ 24V DC

Normally Open/Close

Water

0-80

1.6 MPa

2.4 MPa

1.76 MPa

2.5 MPa

3.75 MPa

2.75 MPa










Material



Part Name

Material

Valve Cap

Gray cast iron, Ductile iron, Carbon steel, Stainless steel, etc.

Spring

Spring steel, Stainless steel, etc.

Diaphragm depressor

Gray cast iron, Ductile iron, Carbon steel, Stainless steel, etc.

Diaphragm

NBR, PTFE, etc.

Valve Rod

45# steel, Stainless steel 2Cr13, 1Cr18Ni9Ti, etc.

Valve Platen

Gray cast iron, Ductile iron, Carbon steel, Stainless steel, etc.

Sealing Ring

NBR, PTFE, etc.

Sealing Ring Platen

Gray cast iron, Ductile iron, Carbon steel, Stainless steel, etc.

Valve Seat

Copper alloy, Stainless Steel

Valve Body

Gray cast iron, Ductile iron, Carbon steel, Stainless steel, etc.


Installation



Dimension


 

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