Bell & Gossett HS 600D Pilot Mounting Hardware Kits Series 2000 Pressure and/or Temperature Steam Regulators - Manual (Page 3)

3
Pilot Installation Detail - For Reference Only
STEP 2 - Mounting Pilot Hardware
A
D
10 Pipe
Diameters
C
B
Applies to All Pilots
Numbers in parentheses refer to items in Kits A or B, pg. 1.
1.
The pilot valve(s) can be installed on either side of the
main valve. The main valve is shipped with the U-
tubing and the bleed orifice installed for left-hand side
mounting of the pilot valve(s). If right-hand side
mounting of the pilot(s) is desired, the U-tubing and
the bleed orifice must be relocated to the opposite
sides of the main valve.
Note: Right-hand side and left-hand side positioning is
determined when the main valve inlet directly faces
the observer.
2. Make sure the bleed orifice is installed in the 1/8 NPT
tapping on the outlet end of the main valve on the
opposite side from the U-tubing. Remove the 1/8 NPT
pipe plug from the bleed orifice and replace it with a
1/8 NPT x 1/4" (6mm) OD tubing, straight compression
fitting (from the hardware kit #10).
3. Install the 1/4 NPT x 1-1/2" (38mm) nipple and half of
the union connection (from the hardware kit #4 and
#5) on the inlet end of the main valve.
4. Use the 1/4 NPT x 4" (101mm) nipple (#3) and the
remaining half of the union connection (from the hard-
ware kit) to mount the first pilot. Mount additional
pilots as required using 1/4" steel pipe nipples.
5. Install the copper tee fitting (from the hardware kit #6)
in the 1/8 NPT signal tapping on the side of the
last pilot with the tee pointing down.
6. Install the L-fitting (from the hardware kit #7) in the tapping
at the center of the main valve diaphragm cover.
Note: For steps 7 and 8, trim the length of the copper
tubing as required (see "Tubing Length Chart", page
2) to make a neat installation. Be sure to ream the
tube to the full tube diameter after cutting.
7. Install the S- or J-copper tubing (from the hardware
kit #2 or #9) from the tee fitting to the bleed orifice.
8. Install the L- copper tubing (from the hardware kit #1)
from the bottom of the tee fitting to the L-fitting in the
main valve diaphragm cover.
9. The 1/4" feedback tapping must be connected to the
downstream piping for either a spring or air pressure
pilot:
• Use 1/4 black steel pipe for the feedback line (B)
(not supplied with this kit).
• Install a 1/4 NPT shut off valve (D) and union (C)
in this line to allow service of the pilot while
operating the system on the by-pass line.
• The feedback line must pitch away from the pilot
to avoid erratic operation, excessive fouling and
eliminate water pockets.
When the regulator is used with a heat exchanger,
connect the feedback line (B) to the heat exchanger
shell. A tee fitting can be installed in the heat
exchanger for a vacuum breaker connection.
1/4 NPT
Feedback
Port
1/4 NPT Inlet
on opposite side
1/8 NPT
Signal Port
(#6 Tee Goes
Here)
Identification of SPS Series Spring Pressure Pilot Ports
Identification of Air and Temperature Pilot Ports
Air Pilots Temperature Pilot
Feedback
Signal
Inlet Signal
Feedback
Inlet
Signal
Inlet