Tomoe 304YA, Instruction Manual

Page: 16 / 29

15
4 INSTALLATION
4. 1 Installation Procedure
4. 1. 1 Installation procedure
At installation, read “
Installation Precautions” in sec-
tion 3. 4 thoroughly and then perform installation in
accordance with the following procedures.
When installing a non-return valve, pump, or flexible
joint made of rubber with this product, insert a short
pipe between the part and this product. Otherwise,
the disc may make contact with the other device
during operation, resulting in faulty operation and
leakage.
CAUTION
1) Clean the flange face that will make contact with
this product. If there is rust or some other foreign
material sticking to the flange face, remove it and
clean the flange face with a suitable cleaning fluid
(alcohol, neutral detergent, etc.). [Fig.-14]
Remove foreign material from the piping completely
before connecting this product to the piping.
2) Before installation or removal work, set the valve
disc in the full-close position. [Fig.-15]
3) After aligning both flanges, insert the piping bolts
as shown in the figure and secure the product to
prevent it from dropping. [Fig.-16]
4) Insert jack bolts in the position shown in the figure
to widen the distance between the flanges. Push
the flanges and make the distance between the
flanges 6 to 10 mm longer than the valve face-to-
face dimension. Do not remove the jack bolts until
all the piping bolts are installed. [Fig.-17][Fig.-18]
5) Do not suspend this product by hanging a hook,
etc. on the handle. Suspend the product by tying
down a well-balanced position, such as the neck
section of the product, with material that does not
damage the body, such as a nylon sling.[Fig.-18]
6) A pressure direction (flow direction) is specified for
this product. When installing, make the pressure
direction of the valve match the direction indicated
by the arrow on the valve body. Insert the product
while taking care not to damage the valve flange
face. At installation, if the product is pushed in the
flange forcibly, the flange face will be damaged,
which will cause leakage.
Be sure to widen the distance between the flanges
using jack bolts, etc. before inserting the product.
[Fig.-18]
7) Insert piping gaskets between the end faces of the
valve and the pipe flange faces.
[Fig.-17]
[Fig.-15]
Close
Jack bolt
Face-to-face dimension
+ 6
～
10mm
[Fig.-18]
Piping gasket
Piping gasket
Jack bolt
Neck
Flow direction indicator
[Fig.-14]
[Fig.-16]