ZMAX pneumatic thin film three-way regulating valveDetailed product description：

ZMAX pneumatic thin film three-way regulating valve is an execution unit in industrial process control. It can replace two right angle single seat or double seat regulating valves and has the characteristics of simple structure, high adjustment accuracy, pipeline saving, and small space occupation. Widely used in temperature control systems for heat exchange in the petroleum industry, it is also applied in certain devices such as metallurgy and chemical engineering.

There are three basic uses of three-way valves
Confluence effect: It is to merge two fluids into a third fluid through a three-way valve.
Diversion function: It is to divide a fluid into two streams after passing through a three-way valve.
Change the direction of fluid flow.

Structural principle of ZMAX pneumatic thin film three-way regulating valve
A three-way valve consists of a pneumatic diaphragm actuator and a valve body.
a、 structural characteristics
Three way valves are divided into three-way merging valves and three-way diversion valves according to their purpose and structural characteristics. Three way merging valve, with two inlets and one outlet, the valve core moves up and down between the two valve seats. The three-way diversion valve has one inlet and two outlets, with the valve core located outside the two valve seats and moving up and down. Both valve cores adopt a hollow thin-walled structure, so special attention should be paid to the influence of temperature and temperature difference during use. Three way valves can be divided into two types of flow characteristics based on their valve core structure: linear and parabolic.
b、 Principle of action
When the three-way valve spool moves, the flow area between the spool and the valve seat changes, which can change the resistance coefficient of the valve, thereby changing the fluid flow rate through the regulating valve, achieving the purpose of adjusting and controlling process parameters.

Parameters and specifications:

Nominal Diameter DN（mm）	confluence	twenty-five	thirty-two	forty	fifty	sixty-five	eighty	one hundred	one hundred and twenty-five	one hundred and fifty	two hundred
	diversion	twenty-five	thirty-two	forty	fifty	sixty-five	eighty	one hundred	one hundred and twenty-five	one hundred and fifty	two hundred
rated flow Coefficient KV	confluence	eight point five	thirteen	twenty-one	thirty-four	fifty-three	eighty-five	one hundred and thirty-five	two hundred and ten	three hundred and forty	five hundred and thirty-five
	diversion						eighty-five	one hundred and thirty-five	two hundred and ten	three hundred and forty	five hundred and thirty-five
Valve seat diameter (mm)		twenty-five	thirty-two	forty	fifty	sixty-five	eighty	one hundred	one hundred and twenty-five	one hundred and fifty	two hundred
Travel distance (mm)		sixteen		twenty-five		forty			sixty
Effective area of membrane (cm)two）		two hundred and eighty		four hundred		six hundred			one thousand
P2=0 membrane thrust is 20KPa Allowable pressure difference △ P (Mpa)		zero point eight five	zero point five two five	zero point five	zero point three	zero point three	zero point two	zero point one two	zero point one two	zero point zero eight	zero point zero five
flow characteristics		Linear
Standard signal (KPa)		20-100
Operating temperature (℃)		Cast steel -40~+200 stainless steel -40~+315
Medium temperature difference (℃)		Below 200 (for merging valves)
Adjustable ratio		1：30
Nominal pressure (Mpa)		1.6      4.0       6.4

ZMAX Pneumatic Thin Film Three way Regulating Valve