2 | Baker Hughes
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Installation
1) The Flexflo Surge Reliever may be installed in either a
vertical or horizontal line. Flow must be in the direction of
the flow arrows.
2) The pressure source for charging the Jacket and Annular
volume must be dry nitrogen, natural gas, or compressed air
at a pressure higher than the desired pressure in the Jacket
Space (the Jacket Pressure Set Point).
DO NOT USE OXYGEN or liquids to pressurize the
Flexflo’s Jacket Space.
3) All connections for the Jacket supply gas must have no
leaks.
4) The range of the Jacket Pressure gauge should be
approximately twice the desired Set Point Pressure.
5) Allow sufficient space for accessing and servicing the Flexflo
Surge Reliever with lifting equipment.
Methods to adjust and hold pressure in the jacket
A. Bottle assembly (See Figure 2). The bottle assembly
provides a convenient method to hold pressure in the jacket
See adjusting pressure with a bottle assembly on page 3.
Figure 2
B. See figure 3. With a pressure source at a higher pressure a
pressure regulator can regulate pressure to the jacket. See
instruction W-887-15LH-B00-1 if this method is chosen.
Figure 3
Temperature changes
Temperature changes in the jacket will change the pressure
when the surge reliever will open. This is important to consider
because the surge reliever could open at a higher pressure than
desired. A few things should be considered for the day to night
and week to week changes in temperature around the surge
reliever.
Ways to deal with temperature changes:
1. Chosen Jacket pressure could be low enough that even with
temperature and pressure changes the surge reliever will
open when needed.
2. A method could be provided by the customer to keep the
temperature around the surge relieve constant.
3. Bottle assembly can be buried in the ground.
4. Shade the surge reliever and bottle assembly.
5. Method B with a hard adjustable regulator could be used.
The pressure regulator can remove excess pressure or add
pressure as needed to the jacket however it also will change
pressure over time so adjustments will be needed. See
instruction W-887-15LH-B00-1 if this method is chosen.
Adjusting pressure with a bottle assembly Installation:
1. Bottles assemblies are coated to allow them to be buried in
the ground with only the top of the bottle(s) exposed. The
purpose of embedding the bottles in the ground is to support
the bottles and to stabilize the temperature of the bottles. If
the Bottles are not buried, the Bottle Assembly should be
secured properly and protected from damage to the bottle(s)
or the pressurized lines.
2. The 1/2” MNPT end, the end with the O-ring, of the Jacket
Connector Assembly, see Figure 4, will be threaded into the
1/2” FNPT Jacket Port of the surge reliever.
a. Clean and inspect the mating surfaces, the O-ring,
and O-ring sealing surfaces for any damage, debris,
or packing material that may interfere with proper
installation or with a pressure tight seal.
b. Thread the 1/2” MNPT end of the Jacket Connector
Assembly into the Jacket Port until it just bottoms out.
Do not tighten. Position the three 5/32 hex head valves
(labeled Supply, Vent, and Cylinder) so they can easily
be adjusted, but will not collect water; and position the
pressure gauge (if equipped) so that it can be easily
read and will not collect water. Tighten the 1-1/4” Lock
Nut with a 1 1/4” wrench against the body of the surge
reliever while holding the body of the Jacket Connector
Assembly. Maintain the proper position of the gauge
and valves.
3. A separate pressure supply source will be required to charge
the Jacket chamber/recharge the Bottle Assembly. When
not in use, insert a 1/4” MNPT pipe plug into the Charging
Supply Connection. The Pipe plug is recommended but not
required.
4. Install the tubing from the Cylinder Connection to the open
tube fitting of the Bottle Assembly. Secure the tubing so that
it is protected from damage and vibration.
5. Visually inspect the system for any open ports, loose
connections, or damaged tubing. Plug or tighten any open
ports or loose connections. Replace any damaged tubing.
6. Loosen the supply and cylinder lock nuts and back out the
threaded nut collars approximately 1 turn.
