Directional spool valves รุ่น WMDH
รายละเอียด Directional spool valves, pilot operated, with mechanical-hydraulic actuation (rotary knob) รุ่น WMDH
- Size 10, 16, 25 (4W.H22), 25 (4W.H25), 32
- Component series 4X, 7X, 6X
- Maximum operating pressure 280 bar
- Maximum flow 1100 l/min
Features
- Type of actuation: pneumatic-hydraulic
- For subplate mounting
- Porting pattern according to ISO 4401 and NFPA T3.5.1 R2-2002
- Subplates according to data sheets 45054 to 45060 (separate order)
- Spring centering, spring end position or hydraulic end position
- Optional auxiliary operating device
- Switching time adjustment, optional
- Preload valve in channel P of the main valve, optional
- Stroke setting at main spool, optional
- Stroke setting and/or end position control, optional
- Inductive position switch and proximity sensors (contactless)
Type code
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WMDH | 6 | * |
| 01 | up to 280 bar | no code |
| 02 | 3-way version | 3 |
| 4-way version | 4 | |
| Types of actuation | ||
|---|---|---|
| 03 | mechanical-hydraulic: Roller plunger | WMDH |
| Size | ||
| 04 | NG10 | 10 |
| NG16 | 16 | |
| NG25 (type 4W.H 22 .7X/…) | 22 | |
| NG25 (type 4W.H 25 .6X/…) | 25 | |
| NG32 | 32 | |
| Spool return in the main valve | ||
| 05 | by means of springs | no code |
| Hydraulic 3) | H | |
| 06 | Spool symbols see symbols | |
| Component series | ||
| 07 | 40 to 49 – NG10 (40 to 49: unchanged installation and connection dimensions) | 4X |
| 60 to 69 – NG25 (4W.H 25.) and NG32 (60 to 69: unchanged installation and connection dimensions) | 6X | |
| 70 to 79 – NG16 (from series 72) and NG25 (4W.H 22.) (70 to 79: unchanged installation and connection dimensions) | 7X | |
| Spool return in the pilot control valve with 2 spool positions only possible with spools B, C, D and hydraulic control spool return in the main valve: | ||
| 08 | With spring return | no code |
| Pilot control valve | ||
| 09 | with mechanical, manual actuation | 6 |
| 10 | Without manual override | no code |
| 11 | External pilot oil supply, external pilot oil return 1) | no code |
| Pilot oil supply internal, pilot oil return external 1; 2) | E | |
| Pilot oil supply internal, pilot oil return internal 2) | ET | |
| External pilot oil supply, internal pilot oil return 1) | T | |
| 12 | Without switching time adjustment | no code |
| Switching time adjustment as supply control | S | |
| Switching time adjustment as discharge control | S2 | |
| Spool position monitoring | ||
| 13 | Without position switch | no code |
| Monitored spool position “a” | QMAG24 | |
| Monitored spool position “b” | QMBG24 | |
| Monitored spool position “a” and “b” | QMABG24 | |
| monitored rest position | QM0G24 | |
| 14 | Stroke setting see stroke setting in type key table | |
| Throttle insert | ||
| 15 | Without throttle insert | no code |
| Throttle Ø 0,8 mm | B08 | |
| Throttle Ø 1,0 mm | B10 | |
| Throttle Ø 1.2 mm | B12 | |
| Throttle Ø 1.5 mm | B15 | |
| Throttle Ø 2.0 mm | B20 | |
| Throttle Ø 2.5 mm | B25 | |
| preload valve (not for NG10) 4) | ||
| 16 | Without preload valve | no code |
| With preload valve (pö = 4.5 bar) | P4,5 | |
| 17 | Without pressure reducing valve | no code |
| With pressure reducing valve | D3 4) | |
| Seal material | ||
| 18 | NBR seals | no code |
| FKM seals (other seals upon request) | V | |
| Observe compatibility of seals with hydraulic fluid used. | ||
| 19 | Information in the plain text | * |
- External pilot oil supply X or return Y:
- with NG10, version SO30 has to be used if sandwich plates are installed. The identification SO30 has to be used at the end of the type designation (sandwich plate).
- the maximum admissible operating parameters of the pilot control valve must be observed!
- observe the maximum pilot pressure!
- Internal pilot oil supply (version “ET” and “E”):
- minimum pilot pressure: please observe the Technical data!
- to prevent inadmissibly high pressure peaks, a “B10” throttle insert must be provided in port P of the pilot control valve (see Pilot oil supply).
- 2 spool positions (hydraulic end position): only piston C, D, Y, K ,Z
- only in connection with throttle insert “B10”
| pSt | Pilot pressure |
| ppilot min | Pilot pressure, minimum |
| ptank | Tank pressure |
| pö | Cracking pressure |
Preferred types and standard units are contained in the EPS (standard price list).
| Model | Code |
|---|---|
| 4WMDH 10 J2-4X/F6T | R901423752 |
