Design and Installation
06-236115-001 4-17 October 2014
4-2.5.3 Cylinders Not Close Coupled Using Pilot Nitrogen Cylinder Pressure
For cylinders not close coupled using nitrogen pressure from one pilot nitrogen cylinder, from
one to fifteen slave HFC-227ea cylinders can be actuated from the one pilot nitrogen cylinder
using pressure operated control heads on the slave cylinders. See Figure 4-7.
Slave operation will be through a 5/16 O.D. x 0.032
in wall stainless steel tubing actuator line
having the following limitations:
• Maximum total length of tubing is 320 ft (97.5 m).
• Maximum length of tubing between cylinder #1 and the last cylinder is 220 ft (67 m).
• The nominal min/max. length of tubing between the nitrogen pilot cylinder and HFC-227ea
cylinder #1 is up to 100 ft (30.5 m).
• If required, the nitrogen pilot cylinder can be located at a distance greater than 100 ft (30.5
m) from HFC-227ea cylinder #1. In this instance, tubing length can be taken from the line
between the slave cylinders and added to the line between the nitrogen cylinder and slave
cylinder #1, provided that the maximum total length of tubing does not exceed 320 ft (97.5
m).
• The tubing actuation line must be designed for a minimum working pressure of 1800 PSIG
(124 bar gauge).
Figure 4-7. Pressure Actuation Using Pressure from 1 Nitrogen Pilot Cylinder to Actuate a Maximum of 15
HFC-227ea Cylinders NOT Closed Coupled
MASTER
CYLINDER
SLAVE
CYLINDER
SLAVE
CYLINDER
SLAVE
CYLINDER
MASTER
CONTROL
HEAD
220 FT. MAX
LENGTH OF TUBING
100 FT. NOMINAL
LENGTH OF TUBING
320 FT. TOTAL
MAX. LENGTH OF TUBING
5/16” O.D. x
.032 WALL
STAINLESS
STEEL
TUBING
TEE P/N
-
WK 699205-050
2
1
15
DISCHARGE
HOSE OR
VALVE OUTLET
ADAPTER
PRESSURE OPERATED
CONTROL HEAD (TYP)
P/N 82-878737-000
90° ELBOW
P/N WK-699205-030
PRESSURE SWITCH (TYP.)
P/N 81-486536-000
PRESSURE TRIP (TYP)
P/N 81-874290-000
(IF REQUIRED)
PIPING
PILOT N
CYLINDER
P/N
2
WK-877940-000
MALE
CONNECTOR
P/N
WK-699205-010
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