Emerson Fisher 67C Series Installation Manual page 2

67C and 67CF Series
practices. Install the regulator in any position desired,
unless otherwise specified, but be sure flow through
the body is in the direction indicated by the arrow on
the body.
It is important that the regulator be
installed so that the vent hole in the
spring case is unobstructed at all times.
For outdoor installations, the regulator
should be located away from vehicular
traffic and positioned so that water, ice
and other foreign materials cannot enter
the spring case through the vent. Avoid
placing the regulator beneath eaves or
downspouts and be sure it is above the
probable snow level.
Overpressure Protection
The recommended pressure limitations are
stamped on the regulator nameplate. Some type of
overpressure protection is needed if the actual inlet
pressure exceeds the maximum operating outlet
pressure rating. Overpressure protection should
also be provided if the regulator inlet pressure
is greater than the safe working pressure of the
downstream equipment.
Regulator operation below the maximum pressure
limitations does not preclude the possibility of damage
from external sources or debris in the line. The
regulator should be inspected for damage after any
overpressure condition.
startup
The regulator is factory set at approximately
the midpoint of the spring range or the pressure
requested, so an initial adjustment may be required
to give the desired results. With proper installation
completed and relief valves properly adjusted, slowly
open the upstream and downstream shutoff valves.
2
note
Adjustment
To change the outlet pressure, remove the closing
cap or loosen the locknut and turn the adjusting
screw clockwise to increase outlet pressure or
counterclockwise to decrease pressure. Monitor
the outlet pressure with a test gauge during the
adjustment. Replace the closing cap or tighten the
locknut to maintain the desired setting.
Taking Out of Service (Shutdown)
!
To avoid personal injury resulting from
sudden release of pressure, isolate the
backpressure regulator from all pressure
before attempting disassembly.
Parts List
Key Description
1 Body
2 Drain Valve
3 Flange Screw
4* O-ring
5 Dripwell
6* Filter Element
7 Spring Case Assembly
9 Filter Retainer
10* Valve Cartridge
(1)
11* Valve Plug
(1)
12* Valve Spring
(1)
13* Valve Retainer
(1)
14* O-ring
(1)
15* Soft Seat
(1)
16* Diaphragm Assembly
17 Spring
18 Adjusting Screw
19 Locknut
20 Upper Spring Seat
22 Pressure Gauge (not shown)
23 Pipe Plug (not shown)
24 Tire Valve (not shown)
26* Filter Gasket
30 NACE Tag (not shown)
31 Panel Mounting Nut
32 Wire Seal (not shown)
33 Closing Cap (not shown)
34 Spacer (not shown)
37* Thrust Washer
39 Bottom Plate
45 Screen Vent
* Recommended Spare Part
1. Valve Cartridge Assembly includes keys 10, 11, 12, 13, 14 and 15.
WarnIng