Design and Installation
October 2014 4-18 06-236115-001
4-2.5.4 Cylinders Close Coupled Using Pilot Nitrogen Pressure
For cylinders close coupled using nitrogen pressure from one pilot nitrogen cylinder from one
to fifteen slave cylinder sets can be actuated from one pilot nitrogen cylinder using pressure
operated control heads on the nitrogen driver cylinders. See Figure 4-8.
Slave operation will be through a 1/4-inch Schedule 40 steel pipe actuator line having the
following limitations:
• Maximum length between the nitrogen cylinder and the first HFC-227ea cylinder is 320 ft
(97.5 m).
• Maximum quantity of flexible actuation hoses is fifteen (one at the nitrogen cylinder and
one at each HFC-227ea cylinder).
• All HFC-227ea cylinders must be located adjacent to one another.
Figure 4-8. Pressure Actuation Using Pressure from 1 Cylinder to
Actuate a Maximum of Fifteen Sets of ECS Cylinders, Close Coupled.
156
5
43
2
1
SLAVE
CYLINDER
(TYP.)
DISCHARGE
HOSE OR
VALVE
PRESSURE TRIP
P/N
81-874290-000
TEE (TYP.)
P/N
WK-699205-050
ACTUATION HOSE
(TYP.)
P/N WK-264986-
000 OR WK-264987-000
ACTUATION HOSE
(TYP.)
P/N WK-264986-000
OR WK-264987-000
PIPING
90° ELBOW
P/N WK-699205-030
PRESSURE
OPERATED
CONTROL HEAD
(TYP.)
P/N 82-878737-000
320’
¼” SCH.
40 PIPE
SEE
ENLARGED
VIEW
MASTER
CYLINDER
MASTER
CONTROL
HEAD
PILOT N
CYLINDER
2
P/N WK-877940-000
PRESSURE
SWITCH
P/N 81-486536-000
MALE CONNECTOR
P/N WK-699205-010
ACTUATION
HOSE
320 FT. MAX.
PIPE LENGTH
1/4” X 1/8” CONCENTRIC REDUCER (TYP.)
1/4” SCH. 40 PIPE
ACTUATION HOSE
MALE CONNECTOR
(BOTH ENDS)
P/N WK-699205-010