ZA4-Series, Modular Air Hydraulic Pumps

  • Enerpac ZA4 high pressure modular air hydraulic pumps feature Z-Class high efficiency air pump design; higher oil flow and bypass pressure
  • ATEX 95 certified for use in potentially explosive atmospheres
  • Two-speed pump operation reduces cycle time for improved productivity
  • User adjustable relief valve built-in on manual valves. Oil ports on valves are 3/8" NPTF
  • Optional heat exchanger warms exhaust air to prevent freezing and cools the oil
  • Full sight oil level glass on 10, 20 and 40 litres reservoirs for easy monitoring of the hydraulic power unit's oil level, oil level indicators on 4 and 8 litres reservoirs.
Used with
Cylinder
Usable
Oil
Capacity
Manual
Valve Model
Number 1)
Valve Function Model
Number
Output Flow Rate 3) Weight
(l/min)
(litres) at 7 bar at 50 bar at 350 bar at 700 bar (kg)
- 4,0 - 2) - ZA4204NX2) 14,0 11,0 1,8 1,3 27
Single-
acting
4,0 VM32 Advance/Retract ZA4204MX 14,0 11,0 1,8 1,3 30
8,0 VM33 Advance/Hold/Retract ZA4308MX 14,0 11,0 1,8 1,3 34
10,0 VM33L Advance/Hold/Retract ZA4610MX 14,0 11,0 1,8 1,3 51
Double-
acting
4,0 VM43 Advance/
Hold/
Retract
ZA4404MX 14,0 11,0 1,8 1,3 31
8,0 VM43 ZA4408MX 14,0 11,0 1,8 1,3 35
10,0 VM43L ZA4810MX 14,0 11,0 1,8 1,3 40
20,0 VM43 ZA4420MX 14,0 11,0 1,8 1,3 52
40,0 VM43 ZA4440MX 14,0 11,0 1,8 1,3 75

1) See valve section for hydraulic symbols of these valves.
2) For remote valve mounting order BSS1090 high pressure connecting plate.
3) Actual oil flow will vary with air supply.

Used with
Cylinder
Usable
Oil
Capacity
Valve Model
Number 2)
Valve Function Model
Number
Output Flow Rate 1) Weight
(in3/min at psi)
(gal) 100 700 5000 10,000 (lbs)
Single-
acting
1.0 Manual
VM32
Advance/
Retract
ZA4204MX 850 675 110 80 65.5
1.75 ZA4208MX 850 675 110 80 75.7
5.0 ZA4220MX 850 675 110 80 112.7
Double-
acting
1.0 Manual
VM43
Advance/
Hold/
Retract
ZA4404MX 850 675 110 80 66.7
1.75 ZA4408MX 850 675 110 80 76.9
2.5 ZA4410MX 850 675 110 80 87.1
5.0 ZA4420MX 850 675 110 80 113.9
10.0 ZA4440MX 850 675 110 80 164.6

1) Actual flow will vary with air supply
2) See valve section for hydraulic symbols and details

Hydraulics-based replacement procedures allow for continuous traffic on the Chicago Skyway Bridge during renovation

Hydraulics-based replacement procedures allow for continuous traffic on the Chicago Skyway Bridge during renovation
Powered by a ZA4 series air-operated 10,000 psi pump, double-acting hollow plunger cylinders remove and replace bridge truss chords, diagonals, plumb posts, laterals, bracing, and floor beams.

 

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