SUN HYDRAULICS
FXFAKBN

$348.28 USD

SUN HYDRAULICS
Material:FXFAKBN
Model:FXFA-KBN
Summary:Cartridge

Quantity in stock: 0

Note: Sales tax, and shipping will be calculated at checkout.

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Sun Hydraulics directly.***
The Sun Hydraulics FXFAKBN (FXFAKBN) is a precision-engineered fixed orifice, pressure-compensated flow control valve designed for applications requiring consistent flow regulation in situations with significant pressure fluctuations. This model is factory-set to a user-specified flow rate, with an accuracy of within 10% of the requested setting, and features a tuneable control option allowing for a 20% variation from the nominal preset flow. The valve's sharp-edged orifice design effectively minimizes variations due to changes in fluid viscosity. It is compatible with T-18A cavities and belongs to Series 4, supporting a capacity of up to 50 gpm (200 L/min) and operating under pressures up to 5000 psi (350 bar). The valve incorporates Sun's floating style construction, which reduces the risk of internal parts binding due to excessive installation torque or machining variations. Its physical and functional interchangeability across all two-port flow control cartridges ensures compatibility while acknowledging that cartridge extension dimensions may vary. Installation requires specific torque settings: the valve hex size is 1-5/8 inches (41.3 mm), with an installation torque of 350 - 375 lbf ft (475 - 508 Nm). The adjustment screw features an internal hex size of 5/32 inches (4 mm), while the locknut has a hex size of 9/16 inches (15 mm) and requires a torque of 80 - 90 lbf in (9 - 10 Nm). Weighing approximately 2.80 lb (1.30 kg), this model also offers Viton seal kits as an additional accessory. While this flow control device excels in maintaining precise flow regulation, it is not recommended for addressing heat issues unless properly sized within your system's parameters.

Description

Fixed-orifice, pressure-compensated flow controls provide precise flow regulation for meter-in or meter-out applications where there may be wide pressure fluctuations. The flow setting is specified by the user and is set at the factory.

Customer must specify a flow rating. Factory set flow ratings are within +/- 10% of the requested setting.
The tuneable control option provides +/- 20% variation from the nominal factory pre-set flow. Turn the adjustment clockwise to increase.
The sharp-edged orifice design minimizes flow variations due to viscosity changes.
All 2-port flow control cartridges are physically and functionally interchangeable (i.e. same flow path, same cavity for a given frame size). However, cartridge extension dimensions from the mounting surface may vary.
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.

Cavity	T-18A
Series	4
Capacity	50 gpm200 L/min.
Maximum Operating Pressure	5000 psi350 bar
Valve Hex Size	1 5/8 in.41,3 mm
Valve Installation Torque	350 - 375 lbf ft475 - 508 Nm
Adjustment Screw Internal Hex Size	5/32 in.4 mm
Locknut Hex Size	9/16 in.15 mm
Locknut Torque	80 - 90 lbf in.9 - 10 Nm
Model Weight	2.80 lb1,30 kg
Seal kit - Cartridge	Viton: 990-018-006

Show FAQ

What happens if I block the bypass port on a priority flow control?	The valve acts as a 2 port restrictive flow control.
How big is a drop of hydraulic oil?	There are exactly 250 Sun drops in a cubic inch or 15 in a cc.
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.
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 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 (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.
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.

SUN HYDRAULICSFXFAKBN

SUN HYDRAULICS
FXFAKBN