2-way, direct-acting electro-proportional, pressure compensated flow control valve with reverse flow check
Normally closed, electro-proportional pressure-compensated flow control with reverse-flow check valves provide precise flow regulation for meter-in or meter-out applications where there may be wide pressure fluctuations. They are proportional from nearly closed up to the maximum flow. An integral high-capacity check valve provides unrestricted flow from port 2 to port 1.
- Exceeds new NFPA test standard T2.6.1 R2014 for fatigue and burst pressure ratings.
- Designed using CFD simulation for optimized geometries.
- All configurations of this valve include zinc-nickel plating as standard for 1000-hour salt fog protection.
- Coil connector options offer ratings up to IP69K. See individual coil product pages for details.
- This cartridge utilizes both 740 Series high-power and 747 Series hazardous location coils.
- Designed and tested to 5-million operational cycles at full-rated pressure.
- For optimum performance, an amplifier with current sensing and adjustable dither should be used. Dither should be adjustable between 80 - 250 Hz.
- This valve is fully compatible with the XMD Expandable Mobile Drivers from Sun.
- A wide variety of coil termination and voltage options are available, with and without surge protection. See the CONFIGURATION section.
- Coils can be mounted on the tube in either direction.
|Capacity||30 gpm120 L/min.|
|Maximum Operating Pressure||5000 psi350 bar|
|Viscosity Range||35 - 2000 SUS2,8 - 380 cSt|
|Response Time - Typical||50 ms50 ms|
|Switching Frequency||3,600 max. cycles/hr3,600 max. cycles/hr|
|Solenoid Tube Diameter||.63 in.16 mm|
|Valve Hex Size||1 1/4 in.31,8 mm|
|Valve Installation Torque||150 - 160 lbf ft203 - 217 Nm|
|Model Weight||1.20 lb0,55 kg|
|Seal kit - Cartridge||Buna: 990016007|
|Seal kit - Cartridge||Viton: 990016006|
|Seal and nut kit - Coil||Viton: 990740006|
|Hysteresis (with dither)||B-spool: 10%, C-spool: 9%B-spool: 10%, C-spool: 9%|
|Linearity (with dither)||3%3%|
|Repeatability (with dither)||1.5%1.5%|
|Recommended dither frequency||100 Hz100 Hz|
|Deadband, nominal (as a percentage of input)||B-spool: 35%, C-spool: 35%B-spool: 35%, C-spool: 35%|
We claim +/- 10%. We set to +/- 5% in production testing to allow for differences in customers' conditions. If you want accuracy, stay in the bottom 2/3rds of the range. Our 12 gpm (45 L/min.) flow controls are quite flat at 9 gpm (34 L/min.) and dead flat below 6 gpm (23 L/min.), until you get to the bottom of the range. Below about .25 gpm (1 L/min.), spool leakage and orifice conditions start to limit accuracy.
I am afraid not. Unless you are overflowing your current valve and correctly size ours, you are not likely to notice any improvement. Priority flow controls are not efficient devices. They are an easy way to get more than 1 source of oil from 1 pump but they can generate a lot of heat. Try to size your actuators so the pressures are similar on both the priority and the bypass circuits. If you can't do that, try to have the lower flow leg be the lower pressure. The pump pressure is determined by whichever leg is higher and if there is flow that is taking a pressure drop that is not doing work it is creating heat.
All flow is blocked, hence the term priority. The priority flow has to be satisfied.
The valve acts as a 2 port restrictive flow control.
The spring force in our flow controls equates to about 100 psi (7 bar). This is high enough to give the valves acceptable capacity (not really) and not too high for proper circuit operation. 100 psi (7 bar) is the spring force; at the upper end of the flow control's range, the drop through the valve will be as high as 250 psi (17 bar) before it starts modulating.
There are exactly 250 Sun drops in a cubic inch or 15 in a cc.
In a meter-in flow control circuit if the pump is set at 3000 psi and the load is 2000 psi the drop through the flow control is 1000 psi. In a meter-out circuit with the load at 2000 psi the drop through the flow control is 2000 psi.
- CANpoint XMD Configuration Software
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