FPBD | Cartridges » Flow Control » Flow Control

This valve is a pilot-operated, normally closed, electro-proportional throttle with reverse free-flow check. Energizing the coil generates an opening force on the pilot stage which vents the main stage poppet to open proportionally, allowing flow from port 2 to 1. In the open condition, flow from 1 to 2 will cause the valve to auto-close and only pilot flow will pass from 1 to 2.

Capacities rated at 200 psi (14 bar) differential and maximum rated coil current.
FLeX Series proportional valves are fully compatible with the XMD Expandable Mobile Drivers from Sun.
Designed and tested to 10 million on-off operational cycles.
Exceeds new NFPA test standard T2.6.1 R2014 for fatigue and burst pressure ratings.
Improved linearity and resolution over similar competing valves.
Designed using CFD fluid simulation for optimized geometries.
For optimum performance, an amplifier with current feedback and adjustable dither (100 - 250 Hz) should be used.
Depending on circuit requirements, a reverse free flow check bypassing the compensator may be needed when using an FPB* with an external compensator.
All configurations of this valve include zinc-nickel plating as standard for 1000-hour salt fog protection.
A wide variety of coil termination and voltage options are available, with and without surge protection. See the CONFIGURATION section.
Coil connector options offer ratings up to IP69K. See individual coil product pages for details.
This valve utilizes the 740 Series low-power coils.
A FULL DATA SHEET is available for this model using the link at the top of the page.
Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.

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Note: Data may vary by configuration. See CONFIGURATION section.

Cavity	T-162A
Series	0
Capacity	5 gpm20 L/min.
Maximum Operating Pressure	3000 psi210 bar
Hysteresis (with dither)	15%15%
Linearity (with dither)	3%3%
Repeatability (with dither)	3%3%
Recommended dither frequency	140 Hz140 Hz
Maximum Valve Leakage at 110 SUS (24 cSt)	0.004 in³/min.@3000 psi0,07 cc/min.@210 bar
Check Cracking Pressure	100 psi7 bar
Viscosity Range	35 - 2000 SUS2,8 - 380 cSt
Deadband, nominal (as a percentage of input)	48%48%
Response Time - Typical	50 ms50 ms
Switching Frequency	15,000 max. cycles/hr15,000 max. cycles/hr
Valve Hex Size	3/4 in.19,1 mm
Valve Installation Torque	20 - 25 lbf ft27 - 33 Nm
Model Weight	.35 lb0,15 kg
Seal kit - Cartridge	Buna: 990162007
Seal kit - Cartridge	Viton: 990162006

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Performance Curve for FPBD: FLeX Series pilot-operated, normally closed, electro-proportional throttle - flow 2-1 - 3000 psi (210 bar)

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I have a heat problem, will Sun's priority flow control help?

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.

What happens if I block the control flow (priority) port?

All flow is blocked, hence the term priority. The priority flow has to be satisfied.

What happens if I block the bypass port on a priority flow control?

The valve acts as a 2 port restrictive flow control.

What is the compensating pressure of Sun's flow controls?

The spring force in our flow controls equates to about 100 psi (7 bar). This is high enough to give the valves acceptable capacity 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.

How big is a drop of hydraulic oil?

There are exactly 250 Sun drops in a cubic inch or 15 in a cc.

What is the pressure drop through a flow control?

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.

How accurate are Sun's flow controls?

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.

What parts of the Sun cartridge valve are field serviceable?

Only external seals are serviceable. Sun offers replacement seal kits for all cartridge models. The applicable kit part number can be found in the product page's Technical Data table or by using our Cartridge Seal Kit search function located under Accessories. Please note: Converting the external seals from one material to another does not ensure fluid compatibility with that material due to the existence of internal seals within the cartridge.

Do FLeX valves utilize a floating nose design?

Yes. All FLeX valves utilize the Sun floating nose design.

What is the difference between nominal and maximum flow capacity?

Nominal flow capacity is based on performance limits. Maximum flow capacity is based on pressure drop. When selecting any direct-acting solenoid valve, first check the performance limits plot, then check if pressure drop is acceptable.

Can FLeX proportional valves be driven with an explosion proof coil?

Yes. The 747 series explosion proof coils can be used on any FLeX proportional valve.

Is the FLeX program available in QuickDesign SmartConnect?

Yes. All FLeX phase 1 valves are available in the SmartConnect schematic tool, and are also available for submittal to QuickDesign.

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Please verify cartridge clearance requirements when choosing a Sun manifold. Different valve controls and coils require different clearances.
An additional 2.00 inches (50,8 mm) beyond the valve extension is needed for coil installation and removal.

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Highlights