2-1
Chapter 2. Installation
2-1. Maximum lifting loads of eyebolts
The diaphragm case has a pair of lifting eyebolts. These eyebolts primarily are for lifting the
actuator alone. When using the eyebolts for other purposes (such as lifting an actuator bed
to its valve body or other components), note that the allowable maxi.mum lifting loads of the
eyebolts are as shown in the following table.
Table 2-1. Maximum lifting loads of eyebolts
Actuator Model No. Allowable Maximum Lifting
Load of Eyebolts
Weight of Actuator Alone
PSA1
HA2
HA3
HA4
160 kg
160 kg
160 kg
220 kg
8 kg
16 kg
32 kg
68 kg
Note: The eyebolts may be used to lift the actuator together with its valve buy (cast globe
valve) of up to pressure rating “Class 600”. When doing this, be extremely careful so that
no shock or other abnormal force is applied to the actuator or the valve body.
2-1. Installing valve in process pipe
(1) Before installing the valve in the process pipe, remove foreign matter (such as scales and
welding chips) from both upstream and downstream sides of the pro.cess pipe.
(2) Confirm that the direction of process fluid flow conforms with that of the arrow.head
mark provided on the valve body.
(3) Pay attention so that the pipe connection gaskets do not extrude into the process pipe
inside. Be sure to use gaskets made of material which is suitable for the pro.cess fluid. The
welding type of valve employ no gaskets.
(4) Pay attention so that no excessively large stress is conveyed from the process pipe to
the valve body. Uniformly tighten the bolts of the process pipe connection flange. The
high pressure type of valves have no flanges, since they are connected to the process by
welding.
(5) Before connecting the air pipes to the actuator and positioner, blow the pipes to clean
them.
(6) Do not install any heating or cooling provisions on the bonnet.
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