Applications; Guidelines For Usage - Becker HPP-5 Instruction Manual

Applications

•
Primary Pressure Control
•
Overpressure Protection (Monitor)
•
Underpressure Protection
(Standby)
•
Relief Valve
•
Backpressure Control
•
Power Plant Type Applications*
•
When Unique "Bleed to Pressure
System" BPS™ feature can be
utilized
•
Any large downstream systems
(city gate stations, inter-system
pressure limiting)
•
Suction control to reciprocating
compressors*
•
Double-stage cut (working moni-
tor regulator*
* (consult Becker for additional information)

Guidelines for Usage

Large Volume Control Valve Actuators:
Control Valves that require large volume
actuators may require Model VB-250
Volume Boosters to ensure adequate
stroking speed. HPP-5 positioners are
NOT compatible with volume boosters.
The HPP-4 positioner must be used
Bleed to Pressure System: The HPP-5
Positioner is typically utilized for applica-
tions where no discharge pressure of
less than 350 psig is available. The very
low steady state bleed of the positioner
makes it efficient for minimizing atmos-
pheric emmisions. The HPP-5 is also
compatible with the Becker BPS (Bleed
to pressure system).
HPP-5
High Gain Systems: The HPP-5 is not
preferred for this application. It may be
successfully used with small diameter
(4" and smaller) ball valves for this appli-
cation, but its limited orifice capacity
makes it too slow for controlling larger
valves on short systems.
CVE Globe Pattern Control Valves: The
Becker HPP series positioners are com-
patible with the Globe style control valve,
but require a minimum of 2" of actuator
stroke for proper feedback and opera-
tion. This makes it impossible to use
this positioner with most globe valves
smaller than 4" port size.
Compatible Actuators:
•
Becker RPDA Actuators (Rotary Pis-
ton Double-Acting)
•
Becker LPDA Actuators (Linear Pis-
ton Double-Acting)
•
Other manufacturer's double-acting
piston actuators*
*consult Becker for additional informa-
tion
Retrofit Compatibility:
Optimum performance is achieved by
pairing the HPP-5 with genuine Becker
control valve actuators. Should you al-
ready have existing control valve actuator
(s) in service, the addition of a Model
HPP-5 can improve performance and
eliminate atmospheric bleed emissions if
using the BPS (Bleed to a pressure sys-
tem) feature.
Some Compatible Actuators:
•
Bettis T-Series Piston Actuators
•
Fisher Type 470 Piston Actuators
•
Fisher Type 1061 Piston
3
HPP-5 Positioner
Instruction Manual
September 1999