Instruction Manual

Series PCHP Pneumatic Calibration Hand Pump
Specifications - Installation and Operating Instructions
Bulletin TE-PCHP
DWYER INSTRUMENTS, INC. Phone: [phone] www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: [phone] e-mail: [e-mail]
The Series PCHP Pneumatic Hand Pump comfortably sources pressure
and vacuum to check calibration of gages, switches, transmitters, and
recorders. The contoured cushion handles provide extra comfort while
preventing the pump from sliding. The oversized check valve provides
smooth operation throughout the output range. The dual o-rings on all pis-
tons ensure zero leakage.
Fittings
The pump is equipped with 1/8˝ and 1/4˝ BSP ports. In order to use NPT
fittings, a NPT to BSP Parallel Thread Adapter is required. These
adapters, which are included with the pump, have a bonded washer
attached to the male end of the adapter.
CAUTION! Do not use thread sealant paste or tape to seal the
adapters to the pump. Do not over tighten adapters.
The pump uses a Schrader valve instead of a needle valve. Thus, full
open or closed is several turns from the end of the travel. Over-
tightening does not increase the seal.
SPECIFICATIONS
Media: Air and compatible gases only.
Output Ranges: -28˝ Hg to 600 psi (-0.945 to 40 bar).
Process Connection: 1/4˝ NPT/BSP.
Gauge Connection: 1/8˝ NPT/BSP.
Materials: Stainless steel fittings, anodized aluminum housing,
plastic/rubber handles, and nitrile o-rings.
Weight: 2 lbs (0.91 kg).
1
/4 BSP WITH
1
/4 NPT ADAPTER
1
/8 BSP WITH
1
/8 NPT
A
DAPTER
1/8 NPT
PLUG
SLIDE
BUTTON
1
-1/8
(
28.58)
3-11/64
(80.57)
8-41/64
(219.48)
7-3/32
(180.18)
5
(
127)
TOP PORT
VERNIER KNOB
SIDE PORT
PRESSURE/
VACUUM
SWITCH
VENT KNOB
KNOB GRIP
HANDLE
CUSHION
SPRING
COVER
SPRING
TENSION
ADJUSTER
Fig. 1
OPERATION
Insure all gauges and instruments to be calibrated are dis-
connected from process pressures before connecting the
pump. The maximum pump design pressure is 600 psig.
Connection to a pressure sources greater than 600 psig could
cause serious injury.
Volume Control
The pump is equipped with two knobs for fine adjustment of the system
pressure. The vent knob can be used to slowly reduce the system
pressure. The vent knob should be closed prior to pressurizing the
system by turning the knob away from the pump housing. The Vernier
knob can be used to increase or decrease the system at a more
controlled rate. For fast relieve of the pressure, move the
pressure/vacuum pin to the opposite direction.
Over Pressure Protection
For a maximum pressure of 600 psi, the handles should be 3/4˝ apart at
the closest point. To reduce the maximum pressure, adjust the spring
tension via the hex nut at the bottom of the main shaft between the
handles. The closer the handles are to each other, the lower the amount
of pressure that will be able to be generated.
Pressure/Vacuum Selector
The pump can be used to generate pressure or vacuum depending on
the position of the pin located in the pressure/vacuum switch. Press the
pin on the side of the pump housing according to labels for the desired
operation.
For High Pressure Operation
Prior to pressurizing, back out the Vernier knob until the ring on the
Vernier shaft is showing. Pump to pressurize. Turn the Vernier knob
towards the pump housing and the pressure should easily be able to
reach 600 psi.
MAINTENANCE
Upon final installation of the Series PCHP Pneumatic Calibration Hand
Pump, no routine maintenance is required. A periodic check of system
calibration is recommended. The Series PCHP is not field serviceable
and should be returned if repair is needed (field repair should not be
attempted and may void warranty). Be sure to include a brief description
of the problem plus any relevant application notes. Contact customer
service to receive a return goods authorization number before shipping.
©Copyright 2014 Dwyer Instruments, Inc. Printed in U.S.A. 4/14 FR# R7-443631-00 Rev.1