LZ700X Ductile Iron Water Pump Control Valve

Model: LZ700X

Item specifics

Nominal Pressure: 1.0/1.6/2.5MPa

Shell Test Pressure: 1.5/2.4/3.75MPa

Seal Test Pressure: 1.1/1.76/2.75MPa

Suitable Medium: Water

Medium Temperature: 0-80℃

Review

Description

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.