(Caution) is used in throughout the manual to identify user warnings and cautions.
(NOTE) is used throughout the manual to identify operating and applications advice and
additional explanations.
High pressure liquids and gases are potentially hazardous. Energy stored in these liquids and gases can
be released unexpectedly and with extreme force. High pressure systems should be assembled and
operated only by personnel who have been instructed in proper safety practices.
transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written
permission of DH Instruments, Inc., 4765 East Beautiful Lane, Phoenix, AZ 85044-5318, USA.
DH Instruments makes sincere efforts to ensure the accuracy and quality of its’ published materials; however, no
warranty, expressed or implied, is provided. DH Instruments disclaims any responsibility or liability for any direct or
indirect damages resulting from the use of the information in this manual or products described in it. Mention of any
product or brand does not constitute an endorsement by DH Instruments of that product or brand. This manual was
originally composed in English and was subsequently translated into other languages. The fidelity of the translation
cannot be guaranteed. In case of conflict between the English version and other language versions, the English
version predominates.
DH Instruments, DH, DHI, MPC1, MPC1-D. PG7000, RPM3 are trademarks, registered and otherwise, of
DH Instruments, Inc.
5.3.1 TEST INLET VALVE........................................................................................................................................18
The DHI Manual Pressure Controller for Differential Pressure (MPC1-D) provides a compact and
easy to use system for manually setting and adjusting pressures between atmosphere and 1 000 or
3 000 psi in systems where precise pressure control is required. MPC1-D is a dual configuration
designed specifically for use in setting and adjusting differential pressures at elevated line pressure.
It is the standard pressure control component for working with DHI’s PG7102 piston gauges in High
Line Differential Pressure mode. A single channel model, MPC1, is available for applications other
than differential pressures at elevated static pressures.
MPC1-D-1000 is for pressures to 1 000 psi (7 MPa), MPC1-D-3000 is for pressures to 3 000 psi
(21 MPa).
1.2 LOCATION OF THE COMPONENTS
L O / H I
B Y P A S S
C L O S E D
O P E N
L O
E Q U A L I Z E
P U S H
T O
C L O S E
1. Variable Volume Equalization Valve (lo side) 5. Vent Valve
The MPC1-D is delivered with the inlet valve closed, exhaust valve open and the variable volume
(VV) fully screwed in. Cap plugs cover all rear panel pressure connections.
2.2 SITE REQUIREMENTS
• Gas supply up to maximum amount for model used.
2.3 INITIAL SETUP
If a DHI PK-7100-MPCD-DIF connections kit P/N 401645 was purchased with the MPC1-D, use it to
make the MPC1-D connections. Refer to the kit’s instruction sheet.
All MPC1-D pressure connections are 1/8 in. NPT female. Therefore, a 1/8 in. NPT male adaptor is
needed to make each of the connections. NPT connections should be sealed using an appropriate
sealing tape on the threads.
Connect the SUPPLY port to a suitable source of clean, dry, non-corrosive gas.
Connect the REF HI and REF LO ports to the hi and lo reference devices. These are the Tare and
Reference PG7102s if setting up a PG7102 High Line Differential Pressure calibration system.
The Tare PG7102 is REF LO, the reference PG7102 is REF HI.
Connect the TEST HI and TEST LO ports to the device under test hi and lo sides.
The VENT port may be connected to direct vented gases if desired, but a connection is not required.