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MA

Product catalog summary

Overview: The document details the MA series manual actuators, specifically designed for operating quarter-turn valves using a hypocycloidal gear train. These actuators are suitable for building and general industrial circuits, offering output torques up to 250 Nm.

Specifications: The actuators are compatible with ISO 5211 mounting plates and feature interchangeable inserts for various valve shaft ends. They are maintenance-free, factory-lubricated, and protected against hose and fine dust (IP 65). The external coating is black polyurethane paint, and they operate within a temperature range of -20°C to +80°C.

Product Range: The MA series includes two models: MA 12 and MA 25. The MA 12 offers a maximum output torque of 125 Nm, while the MA 25 provides up to 250 Nm. Both models have specific dimensions for shaft adaptation and are constructed with zinc-aluminium alloy casings and various steel components.

Construction Details: The MA 12 and MA 25 actuators share similar construction materials, including zinc-aluminium alloy for the gear casing and bonnet, nitrile O-rings, and steel gears. The MA 25 includes additional components like spring washers and a stainless steel identity plate.

Options: Optional features include a locking mechanism by chain and an electric limit switchbox for position indication. The switchbox can accommodate up to two switches and is available with standard or explosion-proof microswitches, or proximity detectors compliant with NAMUR standards.

Additional Information: The document notes that the leaflet is non-contractual and subject to change without notice.

Catalog excerpts

Type series booklet 8505.13/3--10 MA series manual actuators Hypocycloïdal gear train kinematics Output torques up to 250 Nm This document defines the MA series manual actuators designed for the operation of ¼ turn valves by mounting plate ISO 5211. Applications: Building, General circuits for Industry. General features The range ofMA seriesmanual actuators developed andmanufactured by KSB--AMRI covers output torque values up to 250 Nm. The MA series actuators, with hypocycloïdal gear train kinematics, have been specially designed for the operation of centred disc butterfly valves mainly used in the H.V.A.C industry. Mounting plate according to ISO 5211 standard. Equipped with an interchangeable insert, they can be easily fitted on different valve shaft end (square end, flat end, key,..). These actuators are supplied with a handwheel and a visual pointer. Factory lubricated, they do not need any maintenance. Protection : They are hose and fine dust proof (protection degree: IP 65). External coating : Polyurethane paint (colour black RAL 9011, 80 © thickness). Working temperature range : From --20°C to +80° C. Production range Maximum Maximum Number Maximal allowable dimensions for the shaft Type output input of turn ISO 5211 Driving Driving Driving torque torque Handwheel mounting plate* hauteur by square by Flat by key (Nm) (Nm) MA 12 125 23 8 F04, F05 25 17 17 18 MA 25 250 40 8 F07, F10 30 22 22 28 * Direct adaptation onto identical mounting plate. Adaptation by intermediate flange onto different plate (different size or shape).

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MA series manual actuators 2 MA 12 actuator Construction Item Designation Materials 103 Gear casing Zinc--Aluminium alloy 165 Bonnet Zinc--Aluminium alloy 412.1 O--ring Nitrile 412.2 O--ring Nitrile 412.3 O--ring Nitrile 626 Transparent cap Polycarbonate 629 Pointer Polypropylene 87 -- 12 Satellite gear Steel 881 Eccentric shaft Phosphated steel 88 -- 3 Leading unit Zinc--Aluminium alloy 900 Self cutting screw Zinc coated steel 901 Hexagon head screw Zinc coated steel 920 Hexagon nut Zinc coated steel 961 Handwheel Zinc--Aluminium alloy 970 Identity plate Adhesive polyester coated Overall dimensions...

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MA series manual actuators 3 MA 25 actuator Construction Item Designation Materials 103 Gear casing Zinc--aluminium alloy 165 Bonnet Zinc--aluminium alloy 412.1 O--ring Nitrile 412.2 O--ring Nitrile 412.3 O--ring Nitrile 412.4 O--ring Nitrile 554.1 Plain washer Zinc coated steel 554.2 Spring washer Zinc coated steel 59--40 Chuck Zinc alloy 626 Transparent cap Polycarbonate 629 Pointer Polypropylene 87 -- 12 Satellite gear Steel 881 Eccentric shaft Treated steel 88 -- 3 Leading unit Zinc--aluminium alloy and steel 900 Self cutting screw Zinc coated steel 916 Plug Nitrile 932.1 Spring retaining...

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KSB S.A.S. 4, allée des Barbanniers . 92635 Gennevilliers Cedex (France) Tel.: +33 1 41 47 75 00 . Fax: +33 1 41 47 75 10 . www.ksb.com MA series manual actuators Options . Locking by chain The MA series actuators can be supplied with a locking by chain (padlock not supplied by AMRI). . Limit switch indication The MA series actuators can be equipped with an electric limit switchbox. This switchbox is fitted between the valve mounting plate and the actuator and can house upto two switches (one switch on open position, one switch on closed position or one switch on open and closed positions). The...

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