11
Fig. 3 DP17R
DP17R
The DP17R (see Fig. 3) is supplied ready for fitting. Downstream pressure can be adjusted
remotely by a controlled air supply to the pilot diaphragm chamber. The actuating air supply
must be at a pressure approximately 0.7 bar g (10 psi g) above the required downstream
pressure and controlled through a metal bodied self-relieving regulator. A check valve
should be fitted to prevent steam entering the air system, in the unlikely event of a failure
of the pilot diaphragm. Any filter should be fitted with a metal bowl and should preferably
be on the upstream side of the check valve.
The actuating air supply controlled by the regulator should be connected to the union fitting
attached to the air control block as in Fig. 4. The air inlet connection is suitable for 6 mm
O/D copper tube. The maximum reduced pressure available through the DP17R is
15 bar g (218 psi g). Typical installation is shown in Fig. 9, page 17.
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