ACP&D Limited

Servo-hydraulics

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How linear amplifiers work - Picture A
Torque amplifiers, linear amplifiers and NC valves

The servo-hydraulic linear and torque amplifiers use advanced stepper motor technology for precise control of the spool within the valve enabling an accuracy measured in microns (m) to be achieved.

Linear amplifiers - type: LVN,LVK & LVH
 
For linear applications requiring the highest accuracies three ranges are available dependant upon the flow requirements:
 
LVN (up to 80 litres/min at 160 bar);
 
LVK (up to 200 litres/min at 160 bar);
 
LVH (up to 320 litres/min at 300 bar).

Two trunion mounted linear amplifiers
Linear amplifier - Curtiss-Wright Antriebstechnik - LVN - LVK - LVH - LVC

Cylinders on all three ranges are available in diameters between 32-200mm, stroke lengths up to 1,200mm, stroke increments <0.008mm and accuracy's <0.03mm.

Torque amplifiers - type: SFM, SVN & SVK
 
Torque amplifiers are available with an output torque of up to 140Nm for the vane motors (SFM), 230Nm for the smaller piston motors (SVN) and 685Nm for the more powerful piston motors (SVK). A positional accuracy of <0.5 can be attained dependant upon the application.

Servo-hydraulic torque amplifiers with piston motors and vane motors
Seal kits for the LVE, LVN, LVK and LVH linear amplifiers

Looking for spare seal kits? ... In order for us to provide you a price of the seal kit we need to know the TYPE NO. and the six digit FABRICATION NO., for example:

Type no.: LVNG4Z N2 M19/63-36-350-40 / 100
Fab. No.: 605 876


Curtiss-Wright stepping motors

Curtiss-Wright Antriebstechnic / SIG Antriebstechnic / Berger Lahr stepping motors

These stepping motors from Curtiss-Wright Antriebstechnic (formerly SIG Antriebstechnic) are used as the pilot motor on the servo-hydraulic linear amplifiers and torque amplifiers. The step motor accurately controls the movement of the spool inside the NC-valve attached to the hydraulic cylinder or motor. Most versions are coupled to the NC-valve via a flexible coupling (LVN, LVK, LVH, LVH & LVC linear amplifiers as well as the SVN, SVK & SFM torque amplifiers) however one motor (Type 247) which is used on the LVE range of linear amplifiers forms a hydraulic seal with it's flange.

Select the product below to view:

Curtiss-Wright (SIG) 2-phase stepping motors

 

Curtiss-Wright (SIG) 3-phase stepping motors

 

Curtiss-Wright (SIG) 5-phase stepping motors

 

Curtiss-Wright (SIG) 2-phase stepping motors

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[Curtiss-Wright (SIG) stepping motor, Type-100]Curtiss-Wright (SIG) stepping motor, Type-100
Type-100 2-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VN
[More Information - Buy Now]
990.86
[Curtiss-Wright (SIG) stepping motor, Type-101]Curtiss-Wright (SIG) stepping motor, Type-101
Type-101 2-phase stepping motor for use with Curtiss-Wright (SIG) valves, type:
[More Information - Buy Now]
1,200.00
[Curtiss-Wright (SIG) stepping motor, Type-106]Curtiss-Wright (SIG) stepping motor, Type-106
Type-106 2-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VN
[More Information - Buy Now]
1,101.71
[Curtiss-Wright (SIG) stepping motor, Type-14]Curtiss-Wright (SIG) stepping motor, Type-14
Type-14 2-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VK, VH and SFM
[More Information - Buy Now]
1,302.86
[Curtiss-Wright (SIG) stepping motor, Type-14T2]Curtiss-Wright (SIG) stepping motor, Type-14T2
Type-14T2 2-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VK, VH and SFM
[More Information - Buy Now]
1,701.71

Curtiss-Wright (SIG) 3-phase stepping motors

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[Curtiss-Wright (SIG) stepping motor, Type-363]Curtiss-Wright (SIG) stepping motor, Type-363
Type-363 3-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VN
[More Information - Buy Now]
1,320.00
[Curtiss-Wright (SIG) stepping motor, Type-364]Curtiss-Wright (SIG) stepping motor, Type-364
Type-364 3-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VN
[More Information - Buy Now]
825.14
[Curtiss-Wright (SIG) stepping motor, Type-365]Curtiss-Wright (SIG) stepping motor, Type-365
Type-365 3-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VN
[More Information - Buy Now]
1,736.00
[Curtiss-Wright (SIG) stepping motor, Type-366]Curtiss-Wright (SIG) stepping motor, Type-366
Type-366 3-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VN
[More Information - Buy Now]
1,281.14
[Curtiss-Wright (SIG) stepping motor, Type-369]Curtiss-Wright (SIG) stepping motor, Type-369
Type-369 3-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VN
[More Information - Buy Now]
736.00
[Curtiss-Wright (SIG) stepping motor, Type-389]Curtiss-Wright (SIG) stepping motor, Type-389
Type-389 3-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VK, VH and SFM
[More Information - Buy Now]
1,243.43
[Curtiss-Wright (SIG) stepping motor, Type-390]Curtiss-Wright (SIG) stepping motor, Type-390
Type-390 3-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VK, VH and SFM
[More Information - Buy Now]
1,034.29
[Curtiss-Wright (SIG) stepping motor, Type-392]Curtiss-Wright (SIG) stepping motor, Type-392
Type-392 3-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VK, VH and SFM
[More Information - Buy Now]
1,384.00
[Curtiss-Wright (SIG) stepping motor, Type-395]Curtiss-Wright (SIG) stepping motor, Type-395
Type-395 3-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VK, VH and SFM
[More Information - Buy Now]
1,792.00
[Curtiss-Wright (SIG) stepping motor, Type-396]Curtiss-Wright (SIG) stepping motor, Type-396
Type-396 3-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VK, VH and SFM
[More Information - Buy Now]
1,242.29
[Curtiss-Wright (SIG) stepping motor, Type-399]Curtiss-Wright (SIG) stepping motor, Type-399
Type-399 3-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VK, VH and SFM
[More Information - Buy Now]
1,452.57
[Curtiss-Wright (SIG) stepping motor, Type-400]Curtiss-Wright (SIG) stepping motor, Type-400
Type-400 3-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VK, VH and SFM
[More Information - Buy Now]
1,115.43
[Curtiss-Wright (SIG) stepping motor, Type-404]Curtiss-Wright (SIG) stepping motor, Type-404
Type-404 3-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VK, VH and SFM
[More Information - Buy Now]
1,261.71

Curtiss-Wright (SIG) 5-phase stepping motors

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[Curtiss-Wright (SIG) stepping motor, Type-111]Curtiss-Wright (SIG) stepping motor, Type-111
Type-111 5-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VC2
[More Information - Buy Now]
1,380.57
[Curtiss-Wright (SIG) stepping motor, Type-126]Curtiss-Wright (SIG) stepping motor, Type-126
Type-126 5-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VN
[More Information - Buy Now]
664.00
[Curtiss-Wright (SIG) stepping motor, Type-141]Curtiss-Wright (SIG) stepping motor, Type-141
Type-141 5-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VN
[More Information - Buy Now]
432.00
[Curtiss-Wright (SIG) stepping motor, Type-153]Curtiss-Wright (SIG) stepping motor, Type-153
Type-153 5-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VN
[More Information - Buy Now]
443.43
[Curtiss-Wright (SIG) stepping motor, Type-155]Curtiss-Wright (SIG) stepping motor, Type-155
Type-155 5-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VN
[More Information - Buy Now]
758.86
[Curtiss-Wright (SIG) stepping motor, Type-180]Curtiss-Wright (SIG) stepping motor, Type-180
Type-180 5-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VK, VH and SFM
[More Information - Buy Now]
909.71
[Curtiss-Wright (SIG) stepping motor, Type-182]Curtiss-Wright (SIG) stepping motor, Type-182
Type-182 5-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VK, VH and SFM
[More Information - Buy Now]
1,187.43
[Curtiss-Wright (SIG) stepping motor, Type-211]Curtiss-Wright (SIG) stepping motor, Type-211
Type-211 5-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VC2
[More Information - Buy Now]
1,505.14
[Curtiss-Wright (SIG) stepping motor, Type-247]Curtiss-Wright (SIG) stepping motor, Type-247
Type-247 5-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: LVE
[More Information - Buy Now]
1,776.00
[Curtiss-Wright (SIG) stepping motor, Type-253]Curtiss-Wright (SIG) stepping motor, Type-253
Type-253 5-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VN
[More Information - Buy Now]
1,104.00
[Curtiss-Wright (SIG) stepping motor, Type-280]Curtiss-Wright (SIG) stepping motor, Type-280
Type-280 5-phase stepping motor for use with Curtiss-Wright (SIG) valves, type: VK, VH and SFM
[More Information - Buy Now]
1,316.57
[Curtiss-Wright (SIG) stepping motor, Type-477]Curtiss-Wright (SIG) stepping motor, Type-477
Type 247 step motor with ROD246 and mounting kit for use with Curtiss-Wright (SIG) valves, type: LVE
[More Information - Buy Now]
3,382.86

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Downloads
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[File] Servo hydraulics brochure (1.5 MB)

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