RSDS8-WN – Sun Hydraulics Pilot-operated, balanced poppet sequence main stage with integral T-8A control cavity
Part number: RSDS8WN · RSDS8-WN · RSDS8 WN
Pilot-operated, balanced poppet sequence main stage with integral T-8A control cavity. Cavity T-11A, capacity 15 gpm (60 L/min.). Genuine Sun Hydraulics cartridge — MultiFlow is an authorized distributor.
RSDS8-WN overview
RSDS8WN (RSDS8-WN, RSDS8 WN) is a Sun Hydraulics Sun Hydraulics Pilot-operated, balanced poppet sequence main stage with integral T-8A control cavity, rated 15 gpm (60 L/min.) and installed in cavity T-11A. 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.
| RSDS8WN | Buna-N sealsBuna-N |
|---|---|
| RSDS8WV | Viton sealsViton |
Specifications
| Cavity | T-11A |
|---|---|
| Series | 1 |
| Capacity | 15 gpm (60 L/min.) |
| Maximum Operating Pressure | 5000 psi (350 bar) |
| Control Pilot Flow | 7 - 10 in³/min. (0,11 - 0,16 L/min.) |
| Pilot Control Cavity | T-8A |
| Pilot Control Valve Installation Torque | 20 - 25 lbf ft (27 - 33 Nm) |
| Pilot Control Valve Hex Size | 7/8 in. (22,2 mm) |
| Main stage leakage at reseat | 10 drops/min. (0,7 cc/min.) |
| Response Time - Typical | 10 ms |
| Valve Hex Size | 7/8 in. (22,2 mm) |
| Valve Installation Torque | 30 - 35 lbf ft (41 - 47 Nm) |
| Model Weight | .30 lb (0,15 kg) |
| Seal kit - Cartridge | Viton: 990011006 |
Compound cartridge (pilot and main stage) assembly information is provided for reference only. Cartridges must be ordered separately and assembled at point of use.
How to read RSDS8WN
Sun part numbers are the model followed by one code per option. Hyphens, slashes and spaces are only dividers, so RSDS8WN, RSDS8-WN, RSDS8 WN are the same part.
| Model | RSDS8 — Sun Hydraulics Pilot-operated, balanced poppet sequence main stage with integral T-8A control cavity |
|---|---|
| Bias Pressure | W — 100 psi (7 bar) |
| 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. |
Bias Pressure options
- D — 50 psi (3,5 bar)
- W — 100 psi (7 bar)
Seal Material options
- N — Buna-N
- V — Viton
Manifold & standard assemblies
Sun manifolds for cavity T-11A (583)
- A2A Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldRSDS8WN-A2A — request assembly
- A2B Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldRSDS8WN-A2B — request assembly
- A2C Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldRSDS8WN-A2C — request assembly
- A2I Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldRSDS8WN-A2I — request assembly
- A2J Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldRSDS8WN-A2J — request assembly
- A2K Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldRSDS8WN-A2K — request assembly
- A2T Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldRSDS8WN-A2T — request assembly
- A2U Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldRSDS8WN-A2U — request assembly
- A2V Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldRSDS8WN-A2V — request assembly
- A7A Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldRSDS8WN-A7A — request assembly
- A7B Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldRSDS8WN-A7B — request assembly
- A7C Sun Hydraulics Ninety degree with reverse flow check, accepts standard and weatherized coils Line mount manifoldRSDS8WN-A7C — request assembly
Technical features
- All 3 port sequence cartridges are physically and functionally interchangeable (i.e. same flow path, same cavity for a given frame size).
- Pilot flow continues to increase as the pressure at port 1 (inlet), relative to the pressure at port 3 (drain), rises above the valve setting.
- The main stage orifice is protected by a 150 micron stainless steel screen.
- Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar).
- NOTE: With the -8 control option, the main stage valve should first be installed to the correct torque value. The T-8A pilot control valve should then be installed into the main stage valve to its required torque value.
- Because the modulating occurs inside the cartridge these valves are immune to most of the problems associated with cavitation, namely noise and manifold erosion.
- Will accept maximum pressure at port 2; suitable for use in cross port relief circuits.
- 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_Amplifier-New (PDF 2 MB)
- TT_US_Cavity-New (PDF 522 KB)
- TT_US_Sequence-New (PDF 493 KB)
- TT_US_coils-New (PDF 975 KB)
- rel-Prop_terms-definitionsN (PDF 3 MB)
CAD files
Frequently asked questions
Is RSDS8WN the same as RSDS8-WN?
Yes. Sun Hydraulics writes this part number as RSDS8WN. It is the model RSDS8 followed by the configuration code; hyphens, slashes and spaces are only dividers, so RSDS8WN, RSDS8-WN, RSDS8 WN all refer to the same product.
Do you supply RSDS8WN in the UAE, GCC and India?
Yes. MultiFlow supplies genuine Sun Hydraulics cartridges, including RSDS8WN, 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.
How big is a drop of hydraulic oil?
There are exactly 250 Sun drops in a cubic inch or 15 in a cc.
What does Sun mean by the term sequencing?
A sequence valve opens when the pressure at port 1 exceeds the setting of the valve. When pressures at port 1 and port 2 both exceed the setting of the valve the valve goes full open, or sequences. When this happens flow can go in either direction, just so long as port 1 stays above the setting.
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.
What parts of the Sun cartridge valve are field serviceable?
Manufacturer reference: https://www.sunhydraulics.com/model/RSDS8
