Marwin-valve UT Series Pneumatic Actuators User Manual download pdf

3170 Wasson Road • Cincinnati, OH 45209 USA

Phone 513-533-5600 • Fax 513-871-0105

[email protected] • www.marwinvalve.com

I & M UT Series (Pre 2003 Design)

Installation & Maintenance Instructions for

Marwin UT Series Actuators ~ UT-0A, UT5 thru UT7

(all versions), and UT-0 thru UT-4.5 (Pre 2003 Design)

Warning: Marwin Valve Ball Valves must only be used, installed and repaired in accordance with these Installation &

Maintenance Instructions. Observe all applicable public and company codes and regulations. In the event of leakage

or other malfunction, call a qualiﬁed service person; continued operation may cause system failure or a general hazard.

Please read these instructions carefully!

Your Marwin Valve product will provide you with long, trouble-free service if it is correctly installed and maintained.

Spending a few minutes now reading these instructions can save hours of trouble and downtime later. When making

repairs, use only genuine Marwin Valve parts, available for immediate shipment from the factory.

Scope

This manual is intended as a guide to assist customers in the storage, installation, and maintenance of Marwin UT

Series Pneumatic Actuators UT-0A, UT-5 thru UT-7 (all versions), and UT-0 thru UT-4 (Pre 2003 design). See photo on

back page for further identiﬁcation.

Main Characteristics

 Maximum Air Supply: 116 psi (8 bar)

 Supply: dry air (STANDARD). Other ﬂuids or gases are possible if compatible with actuator materials.

 Temperature: from -4°F to +185°F (-20°C to +85°C) for standard version with NBR seals;

from -4°F to +302°F (-20°C to +150°C)) for HIGH TEMP version (Viton seals);

from -40°F to +185°F (-40°C to +85°C) for LOW TEMP version.

 Rotation: 90° stroke with regulation +/-10° in open position.

 Lubrication: during assembly, for the actuator life.

Operating Principle

The Marwin UT pneumatic actuator is a quarter-turn rack and pinion type that transforms the linear motion of the

pistons (7), due to the thrust caused by the pressure on the surface area, to a 90° rotary motion of the pinion (2).

Pressurizing the left or bottom air port (P1) ﬁlls the

external chambers. The action of the pressure on the

surface of the pistons (7) creates a force (F) that pushes

them toward the pinion, generating a torque with

CLOCKWISE ROTATION.

Pressurizing the right or top air port (P2) ﬁlls the internal

chamber. The action of the pressure on the surface

of the pistons (7) creates a force (F1) that pushes

them toward the end caps, generating a torque with

COUNTERCLOCKWISE ROTATION.

Double Acting

CLOSED OPEN

AIR

TOP

VIEW

AIR

1 2 3 4 5 6

Summary of Contents

Page 1 - Operating Principle

3170 Wasson Road • Cincinnati, OH 45209 USAPhone 513-533-5600 • Fax [email protected] • www.marwinvalve.comI & M UT Serie

Page 2 - Disassembly

StorageFor applications where the actuator is not put into immediate service, it is recommended that the actuator be kept in a clean and dry location

Page 3 - Actuator Parts

5. Before starting the disassembly, verify by the stamped marking on the body if the actuator is double acting (DA) or spring return (SR).For DOUBLE

Page 4

-4-SPRING SETTING for UT-0 to UT-4SetExternal SpringCentral SpringInternal SpringAir Supply, psi/(bar)01 1 − 1 36-44 / 2.5-302 2 − 0 44-58 / 3-403 1 −

Page 5 - Assembly

Assembly1. Clean the components before proceeding with the assembly.2. Lightly grease the internal chamber of the body (1) and the seals on the pist

Page 6 - 2003 versus Pre-2003 Design

3170 Wasson Road • Cincinnati, OH 45209 USAPhone 513-533-5600 • Fax [email protected] • www.marwinvalve.comBulletin IM-UT(pre

Marwin-valve UT Series Pneumatic Actuators User Manual

Browse online or download User Manual for Accessories for water Marwin-valve UT Series Pneumatic Actuators. Marwin Valve UT Series Pneumatic Actuators User Manual

Summary of Contents

More documents for Accessories for water Marwin-valve UT Series Pneumatic Actuators

Comments to this Manuals