Page 296 - Praxair - Specialty Gases and Equipment Reference Guide

Gas Delivery Systems

Fully Automatic Changeover Manifolds

™
ProSpec Auto MUHP4 and Auto MUHP3
The Auto MUHP4 and MUHP3 are based on manual 2, 3,
and 4 valve process panels, with inert purging capabilities. By
incorporating a PLC controller, SPASW100, we can automate,
and control switchover from side to side. The SPASW100 is a Section E – Gas Handling Equipment
touch screen controller that uses an analog input signal to
control the switching of gas from one side to the other. The
analog signal can be from a pressure transducer installed on
the inlet side of the primary regulators, or from individual scale
platforms monitoring weight of a liquefied gas cylinder. Simple
Contact Style gauges can also be used. The controller also has
an emergency shutdown feature and an additional fault input.
The SPASW100 uses a pneumatic signal to control the switching
between two pneumatically actuated high pressure valves.

Features and Benefits
n PLC Controller* With 3.5" Touch n Additional Fault Input Capability
Screen Interface
n Fully Automatic Changeover n 1X1 Design for pressures up to
3000 psig
Capability
n Can Auto Switchover on n Outlet pressure range up to
400 psig
Pressure and Weight
n Emergency Stop Button Integral * Controller will require a regulated
air source @85 psig
to Controller
i
Other configurations and custom assemblies are available.
Contact a Praxair representative for further details.

1-877-PRAXAIR www.praxairdirect.com E•295