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Dwyer GFC User Manual

Page 19

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15

4-40 SOCKET
SCREW

SPIDER SPRING

STEM

SEAT-VITON
INSERT

ORIFICE

O-RING

BLOCK

CORE

SPIRAL SPRING

COMPRESSION
SPRING

O-RING

O-RING

ADJUST. SCREW

VALVE BODY

05-19-2006

GUARD
ASSEMBLY

NUT

FIGURE 6-a SOLENOID VALVE

Various corrosive gases may demand more frequent replacement of VITON

®

O-rings and seals inside the valve. Be sure to use an elastomer material, appro-
priate for your specific gas application. Contact your distributor or Dwyer for
optional sealing materials available.

6.2.3 Valve Maintenance for GFC-110/111/113/114 Models

The solenoid valve consists of 316 and 416 stainless steel, and VITON

®

(or

optional NEOPRENE

®

or KALREZ

®

) O rings and seals. No regular maintenance

is required except for periodic cleaning.

It is advisable that at least one calibration point be checked after re-installing the
inlet fitting - see section (7).