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[2] Install a relief type reducing valve.
Fluctuation of supply air pressure results in fluctuation of the pump stroke rate as well as discharge volume. Install
a reducing valve to maintain the air pressure at a fixed level.
[3] Install a safety valve.
Install a safety valve to prevent the supply air pressure from exceeding supply air pressure range.
2.3.2 Points to be observed in air piping
[1] Diameter of pump connection port
The diameter of the connection port on the air sup-
ply side is as follows.
* Connection port diameter
FS-15, 30 : Rc 1/4"
FS-60 : Rc 3/8"
Piping side tube
Pump air supply
port (pump)
Tube coupling
[4] Installation of air exhaust port
The exhaust ports of the air circulation system and the electromagnetic valve must be installed in correct positions
so that the exhaust air is released into the open air.
Caution
Narrowing the air exhaust port may block the air exhaust out of the pump. As a result the bellows may be deformed
inwardly. Determine the necessary air devices with reference to the sample air piping described in 2.3.1. on page
23.
[5] Measure to minimize air exhaust
To minimize the noise of air exhaust, connect the exhaust port with a duct or attach a silencer on the exhaust port.
[6] Installation of multiple pumps
The air consumption of pumps (the total consumption by all pumps installed) increases in relation to the compressor
capacity. The diameter of the pipe must be determined taking into consideration the total number of pumps.
Pump type
Liquid temperature range Supply air pressure range
FS-15·30·60
5-50 deg.C
0.147-0.490 (MPa)
51-100 deg.C
0.147-0.294 (MPa)
101-180 deg.C
0.147-0.196 (MPa)
