10
BLACOH Industries
Step 2 Charging Valve and Optional Gauge Adapter Assembly
Inspect charging valve O-ring and replace if needed (Figure 1). Install charging valve into
dampener charging valve port or, if applicable, into Gauge Adapter Assembly fitting, making sure
charging valve O-ring is properly installed. Use a 3/4” (19 mm) deep socket and torque wrench to
thread charging valve and torque to specifications below based on dampener maximum allowable
working pressure (MAWP).
Torque Specifications:
0 to 10,000 psi
23-25 ft lbs (32-34 Nm)
10,001 to 15,000 psi
30–35 ft lbs (41-47 Nm)
Models with Gauge Adapter Assembly.
Inspect assembly O-rings and replace if needed.
Ensure fitting O-rings are installed in O-ring grooves (Figure 2). Spray adapter fitting O-rings with
a solution of soap and water. Install assembly into dampener charging valve port. Tighten until
flush (metal to metal) using a suitable wrench. While tightening, ensure adapter fitting O-rings
remain seated in O-ring grooves.
Dual Cap Model
Wetted Cap
Dual Cap Model
Non-wetted Cap
Single Cap Model
Non-wetted Housing
Single Cap Model
Non-wetted Cap
Figure 8 Safety Wire & Bolts
Step 3 Charging & Pressure Seal Check
Dampener must be charged and pressure seal checked for Nitrogen leaks prior to
reinstalling safety wire.
Refer to
Charging Instructions
and
Pressure Seal Check
sections
above to properly charge
dampener and check pressure seal before proceeding to next step.
Single Cap Model Non-wetted Cap/Housing & Dual Cap Model Non-wetted Cap
Loop safety wire through wire port in charging valve, twist loose wires together tightly and pull taut from charging valve to the wire port in housing
lip that is in the next clockwise position below cap safety bolt. (If dampener is fitted with optional Gauge Adapter Assembly, pull twisted wire
from charging valve clockwise around assembly fitting and then to housing lip port.) Feed one loose wire end through housing lip port and twist
remaining wire lengths together tightly. Pull twisted wire taut up to cap safety wire bolt which should be located counterclockwise above housing
lip port and wrap
clockwise
once around safety wire bolt.
For single cap models fitted with PTFE bellows where charging valve is installed on non-wetted housing, pull twisted safety wire taut from
charging valve directly to safety wire bolt in housing.
For dual cap models with a second safety wire bolt in housing lip in lieu of a port, pull twisted wire taut from charging valve and wrap clockwise
once around safety wire bolt in cap; pull remaining length taut and wrap once around second safety wire bolt in housing lip.
Ensure no slack in full length of safety wire. Tighten safety wire bolt(s) to secure. Bend wire ends back and down so sharp ends do not protrude.
Reinstall cap eye bolts (dual cap models only).
Dual Cap Model Wetted Cap
Loop safety wire through wire port in housing lip that is in the next clockwise position below cap safety bolt. Twist loose wires together
tightly and pull taut from housing lip up to cap safety wire bolt which should be located counterclockwise above housing lip port and wrap
counterclockwise
once around safety wire bolt.
For models with a second safety wire bolt in housing lip in lieu of a port, pull twisted wire taut from charging valve and wrap
clockwise
once
around safety wire bolt in cap. Pull remaining length taut and wrap once around second safety wire bolt in housing lip. Ensure no slack in full
length of safety wire. Tighten safety wire bolt(s) to secure. Bend wire ends back and down so sharp ends do not protrude.
Step 4 Safety Wire and Bolts, Eye Bolts
All XP high pressure dampeners are equipped with safety wire and bolts which must be
reinstalled after disassembly (Figure 8).
Eye bolts installed on dual cap models for lifting must be reinstalled after disassembly.
Cap
Valve Opening Nut
O-Ring
Figure 1
Charging Valve
Fitting
Charging
Valve
O-Rings
Figure 2
Gauge Adapter Assembly
