BS EN 12078:1998
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Zero governors for gas burners and gas burning appliances
Hardcopy , PDF
02-26-2014
English
12-15-1998
Foreword
1 Scope
2 Normative references
3 Definitions
4 Units of measurement
5 Construction requirements
5.1 General
5.2 Materials
5.3 Connections
5.4 Seals for glands for moving parts
5.5 Pressure test nipples
6 Performance requirements
6.1 General
6.2 External leak-tightness
6.3 Torsion and bending
6.4 Durability
6.5 Zero governor performance
6.6 Endurance
6.7 Lock-up pressure
6.8 Response time
7 Test methods
7.1 Mounting position
7.2 Test conditions
7.3 External leak-tightness
7.4 Torsion and bending
7.5 Durability
7.6 Zero governor performance test
7.7 Pressure drop (fully open)
7.8 Endurance
7.9 Lock-up pressure
7.10 Dynamic response test
8 Marking, installation and operating instructions
8.1 Marking
8.2 Installation, operating and servicing instructions
8.3 Warning notice
Annex ZA (informative) Clauses of this European Standard
addressing essential requirements or other provisions of
EU Directives
Table 1 Connection sizes
Table 2 Maximum external leakage rates
Table 3 Torque and bending moment
Table 4 Gas pressure at inlet to the zero governor
Figure 1 Arrangement for torsion test
Figure 2 Arrangement for bending moment test
Figure 3 Paint scratch test apparatus
Figure 4 Performance test rig
Figure 5 Characteristics of p2 as p1 varies
Figure 6 Characteristics of p2 as q varies
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