66
English
5.906-736.0 Rev. 00 (07/15)
Illustration for pump types 13/20 and 17/20
1 Spring
2 Valve ball
3 Valve seat
Illustration for pump types 9/50 and 13/35
1 Spring
2 Valve disks
3 Valve seat
If the overflow valve is defective, the safety valve guides
the entire flow rate of the pump to the outside and thus pro-
tects the device and accessories against inadmissibly high
overpressure.
If the gun is open, the safety valve is closed and the entire
flow volume of the pump is transferred to the gun at oper-
ating pressure.
If the pressure in the high-pressure system rises by ap-
prox. 20 bar above the permissible operating pressure, the
valve ball or the valve plate (with 350 and 500bar devices)
is lifted off the valve seat and part of the flow volume flows
to the outside.
For safety valve 200bar only
The opening pressure of the safety valve is adjusted with
the adjustment screw.
Rotation to the right increases the opening pressure, rota-
tion to the left decreases the opening pressure.
Normally, the safety valve is preset by the factory. The set-
ting range is between 185 and 250 bar.
NOTE
The safety valve is adjusted via the pressure increase in
the system with the burner turned on, so that it limits the
pressure increase to the max. permissible value (see
Specifications) with the gun closed.
Then seal the settings.
9.16.1 Safety valve
Summary of Contents for HDS 9/50 De Tr1
Page 46: ...46 English 5 906 736 0 Rev 00 07 15 1 Reflector on both sides 2 Marker light on both sides...
Page 182: ...182 English 5 906 736 0 Rev 00 07 15 13 3 Troubleshooting Yanmar diesel engine...
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Page 185: ...English 5 906 736 0 Rev 00 07 15 185 14 3 Maintenance plan Yanmar diesel engine...
Page 189: ...English 5 906 736 0 Rev 00 07 15 189 HDS 13 20 and 17 20 safety block...
Page 190: ...190 English 5 906 736 0 Rev 00 07 15 HDS 9 50 and 13 35 pump head...
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