1 .Production Overview
1.1 Overview of high flow proportional solenoid valve
High flow proportional solenoid valve is Keyto independent research and development of a
large orifice diaphragm solenoid valve, the main function is to control the flow of gas.
Proportional valve control principle: pulse width modulation signal (PWM) control, by changing
drive current of the coil to change the opening degree of the solenoid valve, so that there is a
linear relationship between the current and solenoid valve flow. Proportional valve can take the
way of open loop and closed loop control.
Typical Applications: Ventilators, Oxygenerator/Reservoirs, Anesthesia Delivery & Monitors,
Pressure and Flow Control, Mass flow controller.
1.2 Characteristics of high flow proportional solenoid valve
Orifice diameter: 4.5 mm;
Flow rate: 140slpm (pressure 2 Bar, 25℃, air)
Small dead volume: zero dead volume inside the solenoid valve.
Multiple option for wetted material:
1. Body Material:brass, stainless steel
2. Seal Material:FKM (Special fluoro rubber)
Long lifetime, up to 100 million life cycles at a fixed frequency (not full stroke)
2 Focus on precision fluid control systems G-1451-00
1.3 Words Definition
Response Time(T)
Input air/water at 0.25MPa and maximum working pressure drop from inlet port, input
rated control electrical signal to make the tested solenoid valve open and close, then we’ll get
the change of outlet pressure which we can measure from pressure sensor. At the same time,
we’ll get the lapse of time which starts from power on/off to rise to 90% of max pressure
(normally closed valve) and drop to 10% of max pressure (normally open valve) by quick
response time measure devise. Repeatedly test 3 times and take the average value as the power
on response time and the power off response time.
As engineering experience, it is the design critical value that response time above 50ms.
The aspiration of valve may not stable. Therefore, the response time is not beyond 50ms within
nominal lifetime.
In addition, there is a response time at current method in this industry. The change of
circuit leads to current change, according to the action of solenoid valve. The response time T1,
T2 at current method is normally less than the response time(T) which measured by air flow
method.
Seal Capability
Pressure strengthen (outside leakage).
Solenoid valve powers on, the outlet is close, and the inlet water under condition of 5℃
~40℃ and 1.5 times of nominal pressure. Then ensure all connector won’t leak within
1min.
Sealing(inside leakage)
For two normally closed branches, give one port pressures; put the other port into water.
Under the nominal pressure, there is no bubble come out in 1min.
2.1 Technical Specification
|
Item
|
Value
|
|
Number of ways
|
2 Way Normally Closed
|
|
Function
|
Pressure compensating valve
|
|
Connection
|
4mm tube
|
|
Orifice Size
|
4.5mm
|
|
Fixing
|
Base mounted (2 X M3 screws, length above 23mm is recommended)
|
|
Metal material in contact with media
|
nickel-plated brass, stainless steel, brass
|
|
Non-metal material in contact with media
|
FKM (optional)
|
|
Maximum Flow Rate
|
140slpm @ p = 2.0 Bar
|
|
Withstand pressure
|
0~7 Bar
|
|
Internal leakage
|
<5sccm @ p = 7.0 Bar
|
|
Response Time
|
<10ms
|
|
Cycles per Lifetime
|
> 100 Million cycles
|
|
Temperature range, ambient °C
|
-10℃(unfrozen)to 50℃
|
|
Temperature range, media °C
|
-10℃(unfrozen)to 50℃
|
|
Rated Voltage
|
5v;12V;24V (optional)
|
|
Power Consumption
|
2.8 Watts
|
|
Electrical connection
|
Connector connection (optional)
|
|
Insulation class, °C
|
F155
|
|
Electrical insulation, volt
|
500 AC
|
Lead-time: Stock to 4 weeks
Terms: Std N30 - Inquire for other terms
Payment: L/C,Paypal,Credit Card, or Wire
Shipping Methods: UPS, Federal Express, DHL, Freight Forwarder
We ship to any business address Worldwide
Packaging: Syringes are individually in bubble pack bags/White chip board box
To order or get technical information please contact us by wechat or whatsapp or skype(+86-15978190775):
