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1. Installation
1. Installation
1. Installation
1. Installation
1. Installation
It is necessary during installation to
observe codes of good practice, to comply
with local requirements and to follow the
installation instructions. The installation
location should be protected against frost
and be easily accessible.
1.1 Assembly
1.1 Assembly
1.1 Assembly
1.1 Assembly (Fig. 1)
1.1 Assembly
1. Flush pipework thoroughly.
2. Close valves 1 and 2 .
3. Fit check valve 3 directly into the thread
on the inlet of pressure reducing valves,
filters and filter combinations.
Install in horizontal or with flow
direction pointing upwards in vertical
pipework
Test valve 4 pointing downwards
4. Slowly open valves 1 and 2 .
2. Maintenance
(Fig. 2)
Planned maintenance is recommended
and DIN 1988, Part 8 specifies the
following operations:
The check valve must be tested once a
year. This can be done by the user.
1. Close shutoff valve 1 .
2. Open the test valve 4 .
Until the pressure has been relieved, a
little water will emit from the test valve.
Emission of water should stop after a
few moments. If water continues to drip
or run without stopping, then the check
valve is either damaged or dirty. This
should be corrected by a specialist.
3. Close test valve 4 .
4. Open shutoff valve 1 .
GB
3. Scope of Application
Connection sizes
1
Threaded union R
/
"
2
Union backnut G
1"
Operating
pressure
maximum 25 bar
Operating
temperature
water up to 70 °C
4. Safety Guidelines
1. Use the appliance
In good condition
According to regulations
With due regard to safety
2. Follow installation instructions
3. Immediately rectify any malfunctions
which may influence safety.
4. RV 277 non return valve is exclusively
for use in applications detailed in these
installation instructions.
Any variation from this or other use will
not comply with requirements.
5. Spare Parts
Seals
(10 pieces)
Hexagon blanking
with seals (5 pieces)
Check valve
insert
3
3
1
1
/
"
1" 1
/
" 1
/
" 2"
4
4
2
1" 1
1
/
" 1
1
/
" 2" 2
1
/
"
4
2
2
(Fig. 5)
1
/
"+
3
/
" 0901444
2
4
1"
0901445
1
1
/
"
0901446
4
1
1
/
"
0901447
2
2"
0901448
1
/
"-2"
S 06 M - 1
1
/
2
4
1
/
"
2166200
2
3
/
"
2110200
4
1"
2164400
1
1
/
"
2164500
4
1
1
/
"
2164600
2
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