Dover PSG BLACKMER AIR VALVE Instrukcja instalacji, obsługi i konserwacji - Strona 3
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MOUNTING THE AIR/RELIEF VALVE
1. Remove the pump relief valve cap (1) and turn the adjusting
screw (2) counterclockwise to relieve spring tension.
2. Remove and discard the pump's four relief valve cover bolts
(5 & 5C). Remove the cover assembly (4), spring guide (7),
spring (8), and gasket (10). Clean and inspect the gasket
surfaces, repairing as necessary.
3. Install a new gasket (10).
NOTICE:
The relief valve spring must be confined between the boss
on the air valve (9) and the boss on the diaphragm
assembly (9c).
4. Attach the Blackmer Air Valve assembly to the pump using
the four new bolts provided (5 & 5C). Ensure the valve
cover (4) is positioned so that the air inlet pipe hole is
accessible to attach the air or hydraulic line.
5. Torque the air valve mounting bolts as indicated in Table 1.
PUMP MODEL
TXD2A-AVA
TXD2.5A-AVA, TXH3A-AVA,
TX200B-AVA
TXD3E-AVA
*Torque specification tolerance is +/- 10 lbs in (1.08 Nm).
Table 1
AIR/RELIEF VALVE ADJUSTMENT
NOTICE:
Maintenance
should
be
technicians only, following the appropriate procedures
and warnings as presented in this manual and the
appropriate
pump
installation,
maintenance instructions.
Failure to relieve system pressure prior
to performing pump service or
maintenance can cause personal injury
or property damage.
Hazardous pressure
can cause serious
personal injury or
property damage.
Incorrect settings of the Blackmer air
valve can cause system component
failure, personal injury and property
damage.
Hazardous pressure
can cause serious
personal injury or
property damage.
NOTICE:
If the air valve snap ring (83) is removed, and the
locknuts turned out beyond the snap ring, the diaphragm
(9c) will be damaged allowing pumpage to leak to the
atmosphere.
The Blackmer Air Valve low and high pressure settings are
adjustable within a specific range to suit the engine operating
speed and operating conditions. Refer to Table 2 for the air
valve pressure settings. Attach a suitable pressure gauge at
the pump discharge gauge port (73) to make the required air
valve adjustments. Record the air valve and pump operating
pressures in the "Initial Air Valve Settings" chart.
INSTALLATION
TORQUE * - lbs in (Nm)
150(16.9)
175 (19.8)
225 (25.4)
performed
by
qualified
operation,
and
201-F00
PRESSURE
SETTING / RANGE – PSI (bar)
Pump Operating
Low
High
125 (8.6) Maximum – Do Not Exceed
Peak
Table 2 – Blackmer Diaphragm Air Valve Settings – All Models
Low Pressure Adjustment:
The air valve low pressure adjustment MUST be set first.
NOTICE:
The air valve low pressure setting regulates the delivery
hose pressure when the nozzle is closed. Adjust the air
valve only high enough to open the flow sensing valve.
1.
Adjustment MUST be made with the pump at normal idle
speed - 200 RPM minimum.
2.
SLOWLY close the delivery nozzle, allowing the pressure
to be relieved inside the air valve cap.
3.
Remove the air valve cap (1) and O-ring (88).
4.
Turn the adjusting bushing (2C) clockwise to increase the
pressure setting, or counterclockwise to decrease the
pressure setting. Refer to Table 2 for setting ranges.
5.
Install O-ring and air valve cap; tighten the cap securely.
6.
Open and close the delivery nozzle several times to
ensure the correct setting.
High Pressure Adjustment: - Do not exceed the
maximum pressure listed in Table 2.
1.
Adjustment MUST be made with the pump at normal
operating speed and with pressure behind the air valve
diaphragm.
2.
Slowly close the delivery nozzle, allowing the pressure to
be relieved inside the air valve cap.
3.
Remove the air valve cap.
NOTICE:
To avoid damage to the diaphragm (9c) always use a
counter wrench (opposing wrench) when tightening the
locknuts (2A). Always start with the locknuts turned all
the way down, clockwise, against the adjusting bushing.
4.
Adjust the locknuts counterclockwise to increase the
pressure setting or clockwise to decrease the pressure
setting, until the required high pressure setting is
achieved. See Table 2 for setting ranges.
5.
Install the air valve cap securely.
6.
Open the delivery nozzle and observe the pump's
discharge gauge. Repeat steps 2-5 until required high
pressure setting is achieved.
7.
After the final adjustment is made, ensure that the
locknuts (2A) are tight. Inspect the air valve cap O-ring
(88) and replace as necessary.
NOTICE:
Where regulations require, holes in R/V Cap (1) and
capscrew with hole (5C) are used by the weights and
measures official (s) to apply a security seal or tag.
Page 3/8
100 (6.9) Maximum
10-35 (.69 –2.4)
70-125 (4.8-8.6);
15-25 (1.0-1.7) above normal
operating pressure