Spirax Sarco DP27, Инструкция по установке и обслуживанию

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IM-P470-03
CH Issue 7 17
Fig. 8 Setting procedure sequence DP27, DP27E and DP27Y
Fig. 9 Setting procedure sequence DP27R
4.2 Two or more valves in parallel
When more than one reducing valve is used it is an advantage to use two valves of unequal
size, the smaller one being chosen to meet the lower load requirements and the larger valve
to come into operation so that both meet the normal and maximum demand.
It is necessary to commission each valve independently (one at a time) following the procedure
detailed in Section 4.1 but setting the smaller valve at a pressure higher than the larger valve.
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See Section 3.6, page 11
2
5
2, 9
2, 6
5
3, 7, 8
4
4
Condensate
return
Steam flow
Optional bypass line (see Section 3.10)
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2
5
2, 9
3
2, 6
5
4
4
Condensate
return
Steam flow
Optional bypass line (see Section 3.10)
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See Section 3.6, page 11
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