Radius A Series User Manual

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RADIUS LLC
4922 Technical Drive
Milford, Mi 48381
SERIES A
OPERATION AND
INSTRUCTION MANUAL
There are two series of RADIUS rack & pinion air actuators: those with aluminum bodies and those with
nodular iron bodies. For a better understanding please refer to the table below.
Double action Single action
Aluminum actuators series 003 through 500 series 003 through 500
Cast iron actuators series 750 only series 750 only
The technical features of the aluminum actuators are listed below. If further information on nodular cast
iron is required, please contact RADIUS.
DESCRIPTION
RADIUS actuators are quarter turn actuators; that is to say that the actuator shaft turns 90°, although some
models can be ordered with turning angles of up to 180°. The design of these actuators uses the system of a
double rack – single pinion. One of the most outstanding features of RADIUS actuators, available only
with the aluminum models, is its proprietary, revolutionary double travel stop system. This system allows a
complete regulation of the opening and closing of the aperture without having to remove the covers.
The standard units produce a torque between 132 and 52,660 lb. in. at 80 psi that, together with the shaft’s
output range and its modular design, allows the attachment of a wide variety of control accessories.
ATTACHMENT OF THE ACTUATOR
The RADIUS actuators can be installed directly or by using an adapter on the shaft of any valve. They
have a female coupling machined directly on the shaft that meets DIN-3337 and ISO-5211 standards.
RADIUS also offers a complete range of accessories to complement any coupling concept.
INSTALLATION OF THE ACTUATOR
The RADIUS actuators are normally installed so that their longitudinal axis is parallel to the direction of
the pipeline. The actuators can be installed on top, on the side or underneath the valve they are to attach to
without affecting their operation in anyway.
The actuator output shaft is completely machined and in the shape of an eight pointed star, following DIN-
3337 and ISO-5211 standards, which allows the actuator to be oriented in a way that can adapt to nearly
every installation.

Radius A Series Specifications

General

Brand	Radius
Model	A Series
Category	Controller
Language	English

Summary

Description

Actuator Design and Torque

Details the quarter-turn operation, double rack-single pinion design, and torque output.

Actuator Attachment

Valve Coupling and Standards

Explains direct installation, adapter use, female coupling, and DIN/ISO standards.

Actuator Installation

Installation Steps and Orientation

Covers determining valve type, orientation, and detailed connection steps.

Safety Warning: Pressurized Actuator

Crucial warning against removing actuators while under pressure.

Features and Operating Principles

Basic Actuator Operation

Explains 90° rotation, double/single action, and air pressure effects on piston movement.

Manual Operation Procedure

Details manual operation during air failure and necessary precautions.

Standard Actuation Times

Actuation Time Data

Presents a table of actuation times for various models under no-load conditions.

Air Supply and Electrical Installation

Air Supply Recommendations

Recommends dry, clean air or gas; notes lubrication is not essential but recommended.

Air Pressure Requirements

Specifies required air pressure ranges for double and single action actuators.

General Air Supply Connections

General details on connecting air supply lines to actuator ports.

Double Action Air Connection Procedure

Explains connecting air lines to ports A and B for double action actuators.

Single Action Air Connection Procedure

Explains connecting air supply line to Port A for single action actuators.

Maintenance

Maintenance Precautions

Emphasizes disconnecting power before maintenance and recommends specific lubricants.

Recommended Spare Parts

Spare Parts Kit Contents

Lists items included in replacement parts kits for actuators.

Storage Recommendations

Storage Guidelines

Provides guidelines for storing actuators to prevent damage and maintain performance.

Disassembly and Assembly

Disassembly Procedure

Outlines steps for removing accessories, covers, pistons, and shaft.

Assembly Procedure

Details steps for reassembling actuators, including greasing and alignment.

Single Action Actuator Springs

Spring Set Configurations

Illustrates spring configurations for single action actuators of various models.

Adjustment of Actuator Stops

Double Travel Stop Adjustment

Explains the procedure for adjusting open/close travel stops without actuator disassembly.

Troubleshooting Radius Actuators

Common Problems and Fixes

Lists common actuator problems, their causes, and recommended solutions.