Emerson Bettis PressureGuard, Installation And Maintenance Manual

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March 2014
Installation and Maintenance Manual
E-90090005 Rev. A
9
Section 5: Installation
Installation
Table 2� BETTIS™ PressureGuard™ Components and Descriptions
Item Component Description
1 Operator Rotary or linear (shown) hydraulic operator.
2 Line Valve
Ball, plug, and others, quarter turn or non-6A linear valve
(shown).
3 Handpump
Used to manually pressurize BETTIS™ PressureGuard™
and open a valve.
4 Filter Filters hydraulic fluid before entering Handpump (3) and controls.
5 Check Valve Holds high pressure when Handpump (3) is stroked.
6 Gauge, LP
Stainless steel liquid-filled gauge shows the control pressure
(low-range).
8 Breather Ventilates Reservoir (24) as volume changes.
9 Gauge, HP
Stainless steel liquid-filled gauge shows the operator pressure
(high-range).
10 High-Pressure Relief Valve
A high-pressure relief valve protects the operator and control
system from overpressurization caused by thermal expansion.
12 Pressure Regulator Regulates the hydraulic fluid pressure in the control circuit.
13 Low-Pressure Relief Valve
A low-pressure relief valve protects control circuit from
overpressurization caused by thermal expansion.
14* Pressure Pilot Directly monitors pipeline pressure and can trip ESD.
ns* Selector Valve
Allows selection of automatic command (via Pressure Pilot (14)
and/or Solenoid Valve (20)) or manual command (by technician
at BETTIS™ PressureGuard™ using Reset Valve (23) and/or
Handpump (3)).
20* Solenoid Valve, N.C. Allows remote command of ESD.
23 Reset Valve
A latching trip relay reset valve provides quick closing speeds.
A manual reset function for local reopening of the valve and
manual closing function.
24 Fluid Reservoir Contains the hydraulic fluid for the operator Cylinder and controls.
26 Fluid Level Gauge For visual indication of the hydraulic fluid level and condition.
27 Accumulator
Prevents cyclic transfer due to temperature change of fluid from
high pressure operator supply circuit to the low pressure control
circuit, and thereby prevents temperature induced creep of
the operator.
-* Isolation Test Valve
Typically used to isolate the pressure from the pipeline to the
sensing device (Pressurematic™).
* = Optional component, per customer specification.
ns = Not shown.