Alphair aluminium pneumatic actuators “AP Series”, with internal adjustment, is composed of 17 different models with 90° movement, going from 7 to 10.000 Nm for the double acting version (DA) and from 4 to 4000 Nm for the single acting version (SR); 11 models with 120° and 180° movement, going from 7 to 700 Nm for the double acting version (DA) and from 4 to 120 Nm for the single acting version (SR).
The internal adjustment system, acting on pistons and covers, avoids side-loads on pistons, shaft and body. It assures to the product: compactness, sturdiness, reliability and long-lasting.
The above mentioned series can be coupled with every ISO 5211 compliant valve. Moreover it can also be coupled with valves not in compliance with the a.m. certification. Product can be customized through hard anodizing, nickel-plating and painting.

Rotation 120°

AP032 Y
AP042 Y
AP050 Y
AP063 Y
AP075 Y
AP085 Y
AP100 Y
AP115 Y
AP125 Y
AP145 Y
AP160 Y
*on request
available – not available

Rotation 180°

AP032 X
AP042 X
AP050 X
AP063 X
AP075 X
AP085 X
AP100 X
AP115 X
AP125 X
AP145 X
AP160 X

available – not available


AP 1001/4″
AP 1151/4″
AP 1251/4″
AP 1451/4″
AP 1601/4″
AP 1803/8″
AP 2003/8″
AP 2401/2″
AP 2701/2″
AP 3303/4″ – 3/8″
AP 4201″
available – not available


AIR SUPPLYDry or lubricated filtered compressed air. Feeding pressure 8 bar – 120 PSI. Max = 10 Bar – 145 PSI.
LUBRIFICATIONCarried out by the manufacturer, guaranteed for min. 1.000.000 operations.
ROTATIONTurning rotation range +/- 5°.

Bearings in low friction acetal resin LAT-LUB, easily replaceable for maintenance. Optional HIGH/LOW Temperature = PA 66.

Double lower drilling for valve fastening and centering, according to ISO 5211-DIN 3337 Standards.

Double square lower female shaft key (starlike), according to ISO 5211-DIN 3337 Standards for assembly on valves with square key on line (0°) and diagonal key (45°).

Solenoid connections according to NAMUR VDIVDE-3845 Standards.

Top drilling for accessories fastening, and upper shaft end according to NAMUR VDIVDE-3845 Standards.

Position indicator on request, enabling switch-box assembly on top.

Standard execution for temperatures from –20°C to +80°C (optional, special execution for extreme temperatures).

Aluminium adhesive nameplates, with progressive serial number punched.

Running test and 100% seal test carried out with electronic equipment and certification of each individual product.

BODY Extruded aluminium alloy EN AW 6063 T6Hard anodizing UNI 4522Chemical nickel-plating or PTFE coating
COVERS Aluminium alloy EN AB 46100 T6 Polyester painting 60-80 micronChemical nickel-plating or PTFE coating
PISTONS Aluminium alloy EN AB 46100 T6Hard anodizingStainless steel A182
SHAFT Carbon steelChemical nickel-plating 20 micronStainless steel AISI 304 (A2) – Stainless steel AISI 316 (A4)
BEARINGS Acetalic resin +20% PTFE
SCREWS Stainless steel AISI 304
SPRINGS Pre-compressed Spring CartridgesPolyester
painting 25-30 micron
SEALS Nitrile rubber NBRHIGH temperature = FPM/FKM – LOW temperature = SILICONE
GREASE High performances Syntetic GreaseSpecial grease for HIGH/LOW Temperature