Ross Controls 3_2 VALVES SERIES DM2 D - Manual (Page 2)

2 © 2010, ROSS CONTROLS. All Rights Reserved.
The Leader in Double Valve Design
ROSS has long been in the forefront of
double valve research and development.
For over 60 years ROSS has been respond-
ing to the needs of press manufacturers and
users by progressively improving double
valve technology. Internal flow patterns of
double valves developed by ROSS have
included series flow, parallel flow, combined
series-parallel tandem flow, and combined
series-parallel Crossflow
TM .
Monitoring devices have also been offered
in a variety of designs to satisfy differing
requirements. Traditionally, in order to
achieve complete monitoring capability,
it has been necessary to add devices or
components to the valve or to the control
system.
The DM 2® Series D valve combines the
monitor and the main valve components
into two identical piston-poppet assemblies.
Two piston-poppet assemblies provide
a redundant 3/2 normally closed air flow
pattern and the patented internal design
provides dynamic monitoring as well as
complete memory.
During valve operation air pressure acting
on changing combinations of assembly
surfaces cause the assemblies to move
to the required position. Force balances
in the valve assure positive shifting forces
during normal operation as well as a
positive force to hold the assemblies in a
locked-out position.
Page 13
Accessories
Page 14
DM 2® Series D Double Valves
General Information
Page 15
Repair Kits
Cautions/Warranty
Operating Instructions
Page 10 - 11
Flow Information
Page 3 - 4
Page 12
Ordering Information Page 5
Valve Dimensions Page 6 - 7
Overview of DM 2® Series D
Double Valve
Page 8 - 9
Table of Contents