SUN HYDRAULICS
FRDCCBN

$128.70 USD

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SUN HYDRAULICS
Material:FRDCCBN
Model:FRDC-CBN
Summary:Cartridge

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***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 FRDCCBN (Material Number: FRDCCBN) is a specialized flow control valve designed for precision in hydraulic systems. This valve is a modification of the FRDA model, specifically engineered to manage flow in bypass mode only. It features a unique design where if the bypass pressure exceeds the priority port's pressure, the priority flow ceases to be pressure compensated, which can enhance system stability in certain applications. The valve requires customers to specify a flow rating, with factory settings being accurate within 10% of the requested specification. Operating at a maximum pressure of 3000 psi (210 bar) at port 3, this valve ensures that bypass flow is not available until priority flow requirements are met. Its sharp-edged orifice design minimizes flow variations due to changes in viscosity. Additionally, it offers a tunable adjustment control option that allows up to a 25% variation from the nominal factory preset flow, adjustable via three turns of its adjustment screw. Constructed using Sun's floating style technology, this valve reduces the risk of internal binding caused by excessive installation torque or machining variations. It fits into cavity T-2A and belongs to Series 2 with a capacity of 12 gpm (45 L/min), while its maximum operating pressure reaches up to 5000 psi (350 bar). The maximum input flow is rated at 30 gpm (120 L/min). With precise specifications for installation torque and component sizes, including an internal hex size for the adjustment screw and locknut dimensions, this valve is robustly built for demanding applications. The model weighs .40 lb (.20 kg) and uses Viton seals for durability and reliability in various environments.

Description

This valve is a modification of an FRDA. It controls flow in the bypass mode only. If the bypass pressure exceeds the pressure at the priority port the priority flow will no longer be pressure compensated. This modification was done in an attempt to improve system stability in specific cases.

Customer must specify a flow rating. Factory set flow ratings are within +/- 10% of the requested setting.
Maximum pressure at port 3 should be limited to 3000 psi (210 bar).
Bypass flow is not available until priority flow requirements are satisfied.
The sharp-edged orifice design minimizes flow variations due to viscosity changes.
A tuneable adjustment control option provides up to +/- 25% variation from the nominal factory pre-set flow. Adjustment is done with +/- 3 turns of the adjust screw. Screw in (CW) to increase flow.
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-2A
Series	2
Capacity	12 gpm45 L/min.
Maximum Operating Pressure	5000 psi350 bar
Maximum Input Flow	30 gpm120 L/min.
Valve Hex Size	1 1/8 in.28,6 mm
Valve Installation Torque	45 - 50 lbf ft61 - 68 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	.40 lb0,20 kg
Seal kit - Cartridge	Viton: 990-202-006

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 HYDRAULICSFRDCCBN

SUN HYDRAULICS
FRDCCBN