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VALVE INSTALLATION

DM

 Series E

  

Control Reliable

  

Pneumatic equipment should be installed only by persons trained 

and experienced in such installation.
Air Lines:  Before installing this valve in a new or existing system, the air 

lines must be blown clean of all contaminants. It is recommended that a 

5-micron-rated air filter be installed in the inlet line close to the valve.
Valve Inlet (Port 1):  Be sure that the supply line is of adequate size and 

does not restrict the air supply because of a crimp in the line, a sharp bend, 

or a clogged filter element.  The air supply must not only provide sufficient 

pressure (see Standard Specifications, page 2), but must also provide an 

adequate flow of air on demand.
Valve Outlet (Port 2):  For faster pressurizing and exhausting of the 

mechanism being operated by the valve, locate the valve as close as 

possible to the mechanism.  The lines must be of adequate size and be 

free of crimps and sharp bends.
Valve Exhaust (Port 3):  Do not restrict the air flow from the exhaust port as 

this can adversely  affect the operation of the valve. The valves are factory 

equipped with a properly sized silencer.  ROSS silencers reduce impact 

noise by as much as 25 dB, with minimum back pressure.
Reset Solenoid: DM

2® 

Series E  valves are supplied with a 3/2 normally 

closed solenoid valve for reset purposes.  Electrical reset signal must be 

momentary and of correct voltage.
Electrical Supply: DM

2® 

Series E valves get electrical power through plug-

in connectors.  The electrical supply must correspond to the voltage and 

frequency ratings of the solenoids;  otherwise the solenoids are subject to 

early failure. If power is supplied by a transformer, the power supply must 

be capable of handling the maximum power.  See Valve Specifications on 

page 2 for information on maximum power.
Operating Pressures and Temperatures:  Allowable ranges for pressure and 

temperatures are given in the Standard Specifications on page 2.  Exceeding 

these values can adversely affect performance and shorten valve life.
Pipe Installation:  To install pipe in ports, engage pipe one turn, apply pipe 

thread sealant (tape not recommended), and tighten pipe. This procedure 

will prevent sealant from entering and contaminating the valve.  To install 

pipe with parallel threads (e.g., SAE, ISO 228-I, etc.) do not use sealant.  
Test: After installation or repair and prior to normal use, the valve must be 

tested for proper functioning. Observe normal equipment operation safety 

precautions such as lockout procedures during these tests to avoid personal 

injury or damage to equipment. 
DM

2® 

Series E Test Procedure:   NOTE:  DM

2® 

Series E valves include a 

memory function, and once “locked-out”, must be reset by a dedicated reset 

function in order to be operated further.  Therefore, it may be necessary to 

perform a reset on the valve prior to beginning the test procedure below.  

In order to reset the valve, make sure that supply pressure is present and 

both pilot solenoids are de-energized, then momentarily energize the reset 

solenoid for at least 200 milliseconds.
A)  Electrically energize both pilot solenoids simultaneously.   The valve 

should supply pressure from inlet port (1) to outlet port (2).
There should be no flow to the exhaust port (3) at this time. 

B)  De-energize one of the pilot solenoids.  The valve should go into a lockout 

condition such that any downstream pressure in the outlet port (2) will be 

exhausted to atmosphere through exhaust port (3).  There should also be a 

small, but audible, flow of air out the exhaust port (3) as long as the valve 

remains in the lockout condition.  
C)  Re-energize the pilot solenoid that was de-energized in step B above.  

The valve must remain in the lockout condition.
D)  De-energize both pilot solenoids.  The valve must remain in the lockout 

condition.  
E)  Momentarily energize the reset solenoid (at least 200 milliseconds) to 

reset the valve.  The valve should return to the "ready-to-run" condition.  

There should be no pressure present at outlet port (2) and there should no 

longer be any audible flow of air to exhaust port (3).  
F)  Energize both pilots simultaneously again.  As in step A above, the valve 

should supply pressure from inlet port (1) to outlet 

port (2).  There should be no flow to the exhaust port (3).  
G)  De-energize the other pilot solenoid.  As in step B above, the valve should 

again go into a lockout condition. 

 

H)  Re-energize the pilot solenoid that was de-energized in step G above.  

The valve must remain in the lockout condition. 

 

I)  De-energize both pilot solenoids.  The valve must remain in the lockout condition.  
J)  Momentarily energize the reset solenoid again (at least 200 milliseconds) 

to reset the valve.  The valve should return to the "ready-to-run" condition as 

in step E above.
DM

2® 

Series E  Reset Function:  Both pilots must be de-energized during 

the reset function. A momentary delay is required to complete the reset 

function after the reset solenoid is energized. 

Lockout Indication:  The built-in status indicator shall be used to signal the 

machine controls that a lockout has occurred.  The status indicator utilizes 

a pressure switch.  The pressure switch has 4 electrical contacts. (

NOTE: 

Contact 4 is a ground.)  During normal operation the pressure switch is 

pressurized.  A lockout condition depressurizes the switch until the valve 

is "ready to run" after a reset function has been performed .  Contacts 1 

and 2 are closed when the switch is depressurized (normally closed) and 

contacts 1 and 3 are closed when an adequate pressure signal is applied 
to the switch (normally open).    

Thank You! 

You have purchased a premium-quality ROSS

®

 pneumatic valve.  It is a high quality DM

2® 

Series E Control Reliable double valve with Dynamic Monitoring and Memory for Category 3 and 4 applications, except press 
clutch/brake applications.  With care in its installation and maintenance you can expect it to have a long and economical 
service life.  Before you install this valve, read the information in this folder completely, and save it for future reference.  
IMPORTANT APPLICATION NOTE:  Because of its air flow & exhausting characteristics, this valve is not for use 

in press clutch/brake applications.  ROSS produces the Series DM

2® 

Series D

  and a number of other double valve 

configurations with flow & exhaust characteristics for press clutch/brake applications.

Double Valves with Dynamic Monitoring & Memory  

Basic Size 2

ROSS

 CONTROLS

®

 

  

  

www.rosscontrols.com

Please read and make sure you understand all installation instructions before proceeding with the installation. 

Additional technical documentation is available for download at www.rosscontrols.com. 

If you have any questions about installation or servicing your valve, please contact ROSS or your authorized ROSS distributor, see contact 

information listed at the back of this document, or visit www.rosscontrols.com to find your distributor. 

VALVE OPERATION

NOTE:  DM

2® 

Series E valves include a memory function, and once “locked-out”, must be reset by a dedicated reset function in order to operate further. 

The DM

2® 

Series E valve cannot be reset simply by removing electrical power from both pilot solenoids and/or turning off supply air pressure.  Therefore, 

it may be necessary to perform a reset on the valve prior to normal operation.  In order to reset the valve, make sure that supply pressure is present and 
both pilot solenoids are de-energized, and then momentarily energize the reset solenoid for at least 200 milliseconds.

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