RPETLWN/AP – Sun Hydraulics Anti-Shock, pilot-operated, balanced poppet relief valve, Stainless Steel, Passivated
Part number: RPETLWN · RPET-LWN · RPET LWN
Anti-Shock, pilot-operated, balanced poppet relief valve. Cavity T-10A, capacity 25 gpm (95 L/min.). Genuine Sun Hydraulics cartridge — MultiFlow is an authorized distributor.
RPET-LWN overview
RPETLWN (RPET-LWN, RPET LWN) is a Sun Hydraulics Sun Hydraulics Anti-Shock, pilot-operated, balanced poppet relief valve, rated 25 gpm (95 L/min.) and installed in cavity T-10A. 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.
| RPETLWN/AP | Stainless Steel, PassivatedStainless Steel, Passivated |
|---|---|
| RPETLWN/LH | Mild Steel, Zinc-NickelMild Steel, Zinc-Nickel |
| RPETLWN | Standard Material/CoatingStandard Material/Coating |
Specifications
| Cavity | T-10A |
|---|---|
| Series | 1 |
| Capacity | 25 gpm (95 L/min.) |
| Maximum Operating Pressure | 5000 psi (350 bar) |
| Factory Pressure Settings Established at | 4 gpm (15 L/min.) |
| Control Pilot Flow | 10 - 25 in³/min. (0,16 - 0,41 L/min.) |
| Pressure Ramp Up Time | 100 - 300 ms |
| Response Time - Typical | 2 ms |
| Adjustment - No. of CW Turns from Min. to Max. setting | 4.5 |
| Valve Hex Size | 7/8 in. (22,2 mm) |
| Valve Installation Torque | 30 - 35 lbf ft (41 - 47 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 | .30 lb (0,15 kg) |
| U.S. Patent # | 6,039,070 |
| Seal kit - Cartridge | Viton: 990310006 |
How to read RPETLWN
Sun part numbers are the model followed by one code per option. Hyphens, slashes and spaces are only dividers, so RPETLWN, RPET-LWN, RPET LWN are the same part.
| Model | RPET — Sun Hydraulics Anti-Shock, pilot-operated, balanced poppet relief valve |
|---|---|
| Control | L — Standard Screw Adjustment |
| Adjustment Range | W — 3000 - 4500 psi (210 - 315 bar), 3000 psi (210 bar) Standard Setting |
| 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
- C — Tamper Resistant - Factory Set
- L — Standard Screw Adjustment
Adjustment Range options
- A — 2000 - 3000 psi (140 - 210 bar), 2000 psi (140 bar) Standard Setting
- C — 4500 - 6000 psi (315 - 420 bar), 4500 psi (315 bar) Standard Setting
- W — 3000 - 4500 psi (210 - 315 bar), 3000 psi (210 bar) Standard Setting
Seal Material options
- N — Buna-N
- V — Viton
Material/coating options
- /AP — Stainless Steel, Passivated
- /LH — Mild Steel, Zinc-Nickel
- — Standard Material/Coating
Manifold & standard assemblies
Sun manifolds for cavity T-10A (293)
- CBD Sun Hydraulics ISO 05: A and B to T Sandwich manifoldRPETLWN/AP-CBD — request assembly
- CBE Sun Hydraulics ISO 05: P to T Sandwich manifoldRPETLWN/AP-CBE — request assembly
- CBF Sun Hydraulics ISO 05: A to T Sandwich manifoldRPETLWN/AP-CBF — request assembly
- CBG Sun Hydraulics ISO 05: B to T Sandwich manifoldRPETLWN/AP-CBG — request assembly
- CBH Sun Hydraulics ISO 05: A to B or B to A Sandwich manifoldRPETLWN/AP-CBH — request assembly
- CBI Sun Hydraulics ISO 05: A to B and B to A Sandwich manifoldRPETLWN/AP-CBI — request assembly
- CJY Sun Hydraulics ISO 05 – X&Y: A to B and B to A Sandwich manifoldRPETLWN/AP-CJY — request assembly
- FA3 Sun Hydraulics Ninety degree Line mount manifoldRPETLWN/AP-FA3 — request assembly
- FA4 Sun Hydraulics Ninety degree Line mount manifoldRPETLWN/AP-FA4 — request assembly
- FAA Sun Hydraulics Ninety degree Line mount manifoldRPETLWN/AP-FAA — request assembly
- FAB Sun Hydraulics Ninety degree Line mount manifoldRPETLWN/AP-FAB — request assembly
- FAC Sun Hydraulics Ninety degree Line mount manifoldRPETLWN/AP-FAC — request assembly
Technical features
- All 2-port relief cartridges (except pilot reliefs) are physically and functionally interchangeable (same flow path, same cavity for a given frame size).
- Will accept maximum pressure at port 2; suitable for use in cross port relief circuits.
- Not suitable for use in load holding applications.
- When pressure at the inlet (port 1) exceeds the threshold setting, the valve opens to tank (port 2). The pilot section moves forward at a steady rate, increasing the setting by compressing the pilot spring. Maximum setting is achieved when the pilot section reaches a mechanical stop.
- Valve provides protection for pumps and motors from pressure transients due to sudden load changes, especially variable displacement pumps, since the displacement mechanism is sometimes too slow to catch these pressure transients.
- Valve provides protection for hydrostatic drives by reducing the jerk caused by sudden reversals. The valve is suitable for cross-port applications.
- When used with a switching device, the valve can provide the ramp characteristic typically provided by proportional valves.
- Small power units can be started against an anti shock relief to provide longer pump life.
- Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
- Corrosion resistant cartridge valves are intended for use in corrosive environments and are identified by the model code suffix /AP for external stainless steel components, or /LH for external zinc-nickel plated components. See the CONFIGURATION section for all options. For further details, please see the Materials of Construction page located under TECH RESOURCES.
- 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
- 999-901-334 (PDF 344 KB)
- FloatingStyleScrewInCartridge2 (PDF 1 MB)
- TT_US_Cavity-New (PDF 522 KB)
- TT_US_Relief-N (PDF 656 KB)
CAD files
Frequently asked questions
Is RPETLWN the same as RPET-LWN?
Yes. Sun Hydraulics writes this part number as RPETLWN. It is the model RPET followed by the configuration code; hyphens, slashes and spaces are only dividers, so RPETLWN, RPET-LWN, RPET LWN all refer to the same product.
Do you supply RPETLWN in the UAE, GCC and India?
Yes. MultiFlow supplies genuine Sun Hydraulics cartridges, including RPETLWN, 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.
Direct acting or pilot operated - what do I use?
Direct-acting valves are used to prevent over pressure, and pilot-operated valves are used to regulate pressure. If you are unsure, use a direct-acting valve. Sun's direct acting valves are very fast, dirt tolerant, stable, and robust. Sun's pilot-operated valves are moderately fast, they have a low pressure rise vs. flow curve, and they are easy to adjust.
Where would I use a kick-down relief?
One graphic example is on a portable grain auger for silos. When the farmer gets caught in the auger the kick-down relief trips and allows him to escape.
What are the tolerances on pressure settings for Sun's pressure control valves?
Pressure setting tolerances are listed in our Performance Data page. A link to this page can also be found in the Additional Resources tab of the applicable product page.
How big is a drop of hydraulic oil?
There are exactly 250 Sun drops in a cubic inch or 15 in a cc.
Can I use a kick-down relief for my system relief?
Maybe not. We build in a good amount of overlap in the kick-down reliefs to prevent false tripping. This means they are not as fast as our standard pilot-operated reliefs. A direct-acting relief valve set just above the kick-down relief valve would be good insurance.
What parts of the Sun cartridge valve are field serviceable?
Manufacturer reference: https://www.sunhydraulics.com/model/RPET
