FRELLAV – Sun Hydraulics 3-way, fully adjustable, bypass/restrictive, priority flow control valve, Viton seals
Part number: FRELLAN · FREL-LAN · FREL LAN
3-way, fully adjustable, bypass/restrictive, priority flow control valve. Cavity T-17A, capacity 30 gpm (120 L/min.). Genuine Sun Hydraulics cartridge — MultiFlow is an authorized distributor.
FREL-LAN overview
FRELLAN (FREL-LAN, FREL LAN) is a Sun Hydraulics Sun Hydraulics 3-way, fully adjustable, bypass/restrictive, priority flow control valve, rated 30 gpm (120 L/min.) and installed in cavity T-17A. MultiFlow supplies genuine Sun Hydraulics cartridges in the UAE, GCC and India — use Add to Enquiry above for availability and a quotation.
Ordering codes
Pick the code that matches the material and finish you need. Add it to your enquiry above, or tap a code to select it.
| FRELLAN | Buna-N sealsBuna-N |
|---|---|
| FRELLAV | Viton sealsViton |
Specifications
| Cavity | T-17A |
|---|---|
| Series | 3 |
| Capacity | 30 gpm (120 L/min.) |
| Maximum Operating Pressure | 5000 psi (350 bar) |
| Viscosity Range | 35 - 2000 SUS (2,8 - 380 cSt) |
| Adjustment - No. of CCW Turns from Fully Closed to Fully Open | 5 |
| Typical Valve Leakage at 110 SUS (24 cSt) from port 1 to port 3 at 5000 psi (350 bar) | 75 mL/min. |
| Rated Maximum Priority | 17.6 gpm (66,5 L/min.) |
| Response Time - Typical | 50 ms |
| Valve Hex Size | 1 1/4 in. (31,8 mm) |
| Valve Installation Torque | 150 - 160 lbf ft (203 - 217 Nm) |
| Model Weight | 1.20 lb (0,55 kg) |
How to read FRELLAN
Sun part numbers are the model followed by one code per option. Hyphens, slashes and spaces are only dividers, so FRELLAN, FREL-LAN, FREL LAN are the same part.
| Model | FREL — Sun Hydraulics 3-way, fully adjustable, bypass/restrictive, priority flow control valve |
|---|---|
| Control | L — Standard Screw Adjustment |
| Adjustment Range | A — .02 - 18 gpm |
| Seal Material | N — Buna-N |
| Material / coating | Add /AP (stainless steel, passivated) or /LH (mild steel, zinc-nickel) to the end; no suffix is the standard finish. |
Control options
- H — Calibrated Handknob with Detent Lock
- K — Handknob
- L — Standard Screw Adjustment
- Y — Tri-Grip Handknob
Adjustment Range options
- A — .02 - 18 gpm
Seal Material options
- N — Buna-N
- V — Viton
Manifold & standard assemblies
Sun manifolds for cavity T-17A (377)
- BJO Sun Hydraulics ISO 05 – X&Y: On P, port 3 to T Sandwich manifoldFRELLAV-BJO — request assembly
- BK2 Sun Hydraulics ISO 07: Reducer on A with reverse flow check Sandwich manifoldFRELLAV-BK2 — request assembly
- BK4 Sun Hydraulics ISO 07: Sequence into A with reverse flow check Sandwich manifoldFRELLAV-BK4 — request assembly
- BK5 Sun Hydraulics ISO 07: Sequence into B with reverse flow check Sandwich manifoldFRELLAV-BK5 — request assembly
- BK6 Sun Hydraulics ISO 07: Sequence out of A with reverse flow check Sandwich manifoldFRELLAV-BK6 — request assembly
- BK7 Sun Hydraulics ISO 07: Sequence out of B with reverse flow check Sandwich manifoldFRELLAV-BK7 — request assembly
- BK8 Sun Hydraulics ISO 07: Cushion lock Sandwich manifoldFRELLAV-BK8 — request assembly
- BK9 Sun Hydraulics ISO 07: Reducer on A and B with reverse flow check Sandwich manifoldFRELLAV-BK9 — request assembly
- BKA Sun Hydraulics ISO 07: On A, port 3 to B Sandwich manifoldFRELLAV-BKA — request assembly
- BKB Sun Hydraulics ISO 07: On B, port 3 to A Sandwich manifoldFRELLAV-BKB — request assembly
- BKC Sun Hydraulics ISO 07: On A, port 3 external Sandwich manifoldFRELLAV-BKC — request assembly
- BKJ Sun Hydraulics ISO 07: Reducer on B with reverse flow check Sandwich manifoldFRELLAV-BKJ — request assembly
Technical features
- Both priority and bypass flow are usable up to the system operating pressure.
- Priority remains relatively constant regardless of variation in input flow.
- Bypass flow is not available until priority flow requirements are satisfied.
- Pressure at the bypass port (port 2) may exceed pressure at the priority port (port 3).
- In applications where the priority flow will be completely blocked, bypass pressure drop will increase over time unless a leak path is provided for the priority flow.
- Designed using CFD fluid simulation for optimized geometries.
- Exceeds NFPA test standard T2.6.1 R2014 for fatigue and burst pressure ratings.
- 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.
Drawings, symbol & performance curves
Downloads
Datasheet
Technical reference sheets
CAD files
Frequently asked questions
Is FRELLAN the same as FREL-LAN?
Yes. Sun Hydraulics writes this part number as FRELLAN. It is the model FREL followed by the configuration code; hyphens, slashes and spaces are only dividers, so FRELLAN, FREL-LAN, FREL LAN all refer to the same product.
Do you supply FRELLAN in the UAE, GCC and India?
Yes. MultiFlow supplies genuine Sun Hydraulics cartridges, including FRELLAN, to customers in the UAE, the wider GCC and India. Use Add to Enquiry on this page for availability, lead time and a quotation.
Can I get the datasheet and CAD files?
Yes. The datasheet, technical reference sheets and CAD files (DXF, DWG, STP) are listed in the Downloads section of this page.
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.
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 parts of the Sun cartridge valve are field serviceable?
Manufacturer reference: https://www.sunhydraulics.com/model/FREL
