HCV-DC-170-345-009 Directional Valve — HCIC
HCV-DC-170-345-009 is an HCIC directional control with a published rated flow of 170 L/min, a maximum operating pressure of 345 bar, and a Subplate / ISO 4401 interface. It carries PARKER D31 as its cross-reference number and is used primarily for marine and steel-plant auxiliary systems. Comparison figures are drawn from published technical literature and labelled with their data grade.
Cross number & interchangeability
| Product brand | HCIC |
|---|---|
| HCIC model / part number | HCV-DC-170-345-009 |
| Cross number (replaceable reference) | PARKER D31 |
| Cross-reference manufacturer | Parker Hannifin |
| Cross-reference model | D31 |
| Cross-reference family | HVD two stage |
| Relationship | Cross reference / selection alternative — interchangeability to be verified |
| Cross-reference source | S22 — https://discover.parker.com/DCV |
Product image
Technical drawings & circuit symbol
Hydraulic circuit symbol
Outline dimensional drawing
Mounting interface / cavity
At a glance — key facts
| What is this product? | HCV-DC-170-345-009 is an HCIC directional control. |
| Which model does it cross-reference? | PARKER D31 (Parker Hannifin D31) — identification only, not a certified interchange. |
| Is this an original OEM part? | No. This is an HCIC product; the referenced manufacturer name and model are used as a cross number only. |
| What is the rated flow? | 170 L/min |
| What is the maximum operating pressure? | 345 bar |
| What mounting / cavity does it use? | Subplate / ISO 4401 |
| What are the outline dimensions? | L 205 mm |
| What is it used for? | Typical applications: marine and steel-plant auxiliary systems; mobile equipment with subplate manifolds; machine tools and machining centres. |
| Where do the comparison figures come from? | Official series catalogue / selection table - parameters are series ratings (source S22). |
Technical specifications
| Rated / nominal flow | 170 L/min |
|---|---|
| Rated flow (US) | 45 US gpm |
| Max. operating pressure | 345 bar |
| Max. operating pressure (US) | 5004 psi |
| Mounting / interface | Subplate / ISO 4401 |
| Engineering note | Official DCV selection table: max 5000 psi, max 45 GPM |
| Fluid (series typical) | Hydraulic oil per DIN 51524; water glycol on request |
| Fluid temperature (series typical) | -20 to +70 C (NBR -25 to +70 C) |
| Viscosity (series typical) | 2.8 - 400 cSt; 30 - 80 cSt recommended |
| Cleanliness target (series typical) | ISO 4406 18/16/13 |
Data grade: Official series catalogue / selection table - parameters are series ratings
Dimensions & mounting data
| L | 205 mm |
|---|---|
| W | 45 mm |
| H | 70 mm |
Mounting interface — ISO 4401:2005 subplate interface
| Pattern | 4401-03-02-0-05 |
|---|---|
| Max Port Diameter Mm | 7.5 |
| Fastening | 4 x M5, 7-10 Nm |
Envelope basis: series-typical · Interface basis: standard-interface · DOC06 - ISO 4401-03 / NG06 / CETOP 3 mounting interface coordinates
Function
Directs pump flow between the P, T, A and B ports to start, stop and reverse hydraulic actuators. Direct-operated solenoids cover smaller sizes; pilot-operated stages handle larger flows.
Key features
- Optional manual override and position monitoring
- Hazardous-area certified versions available on selected series
- ISO 4401 / CETOP subplate mounting interface for interchangeability
- Wet-pin solenoid design for long service life and low noise
- Wide choice of spool functions including closed, float, regenerative and unloading centres
Typical applications
- Marine and steel-plant auxiliary systems
- Mobile equipment with subplate manifolds
- Machine tools and machining centres
- Injection moulding and die casting machines
- Hydraulic presses and shears
Selection & commissioning notes
- Performance limits are usually given for two-direction flow; single-direction flow can reduce the admissible flow considerably due to flow forces.
- Observe the specified mounting bolt grade, torque and mounting-surface flatness to avoid spool binding.
- Check the T-port maximum pressure separately; it is commonly lower than the P/A/B rating.
Request a quote — 48-hour turnaround
MOQ 1 piece (samples charged, sample fee not refunded against later orders); T/T 30% deposit + 70% before shipment; 18-month warranty; quotes within 48 hours; lead time 45-60 days for samples and 30-45 days for batch orders of 50+ pieces; standard and in-stock items ship faster. Designed to ISO 6020 / 6022 / 10100. Contact davidsong@mail.huachen.cc or +86 153 7619 8599.
Frequently asked questions
Which spool centre should I choose?
A closed centre holds the actuator, a float centre lets it move freely, and an open P-to-T centre unloads the pump. Base the choice on what the actuator must do when the valve is de-energised.
Why is the T-port pressure rating lower?
Return-side seals, spool design and the solenoid tube are not rated for full system pressure. Exceeding the T rating can damage the valve or blow out a seal.
What does NG06 / CETOP 3 mean?
It is the nominal valve size and its ISO 4401-03 mounting pattern. NG10 / CETOP 5 is the next larger frame with a higher flow capability.
Is HCV-DC-170-345-009 a genuine Parker Hannifin part?
No. HCV-DC-170-345-009 is an HCIC product. Parker Hannifin D31 is provided only as a cross-reference number for identification. HCIC is not affiliated with, endorsed by, or an authorised distributor of Parker Hannifin. Verify all dimensions, ratings and settings before any substitution.
Can HCV-DC-170-345-009 be used in place of PARKER D31?
It is listed as a cross reference, not a certified drop-in replacement. Compare the cavity or mounting pattern, rated flow, maximum pressure, pilot ratio or spool function, seal material and pressure setting with the installed unit, and confirm with an HCIC engineer before ordering. Refer to the dimensions and interface drawings on this page.
Provenance & data quality
HCIC model: HCV-DC-170-345-009 · Brand: HCIC · Cross number: PARKER D31 (Parker Hannifin D31, HVD two stage family — identification reference only)
Source ID: S22 · Source type: manufacturer · Date modified: 2026-11-11
Data grade: Official series catalogue / selection table - parameters are series ratings
Authoritative source: https://discover.parker.com/DCV