1
EPDT-351
1. Specifications
1.1 Specifications
Model
GD-28S-NE
GD-29S-NE
Nominal size
20A - 50A
20A - 100A
Application
Cold and hot water
Inlet pressure
2.0 MPa or less
Reduced pressure
A
0.20 - 0.35 MPa
B
0.30 - 0.70 MPa
Min. differential pressure
0.05 MPa
Controllable range
Refer to Specifications Selection Chart *1
Max. temperature
90
°
C
M
a
te
ri
a
l
Body
Stainless Steel
Valve seat
Stainless Steel
Valve disc
Synthetic rubber
Diaphragm
Synthetic rubber
Connection
JIS Rc screwed
JIS 20K RF flanged *2
The products from 20A to 50A are equipped with built-in strainer (40 mesh).
Pressure gauge connection port is JIS R1/4.
Products complying with the Water Supply Act
*1: It can be used under the condition that the maximum pressure reduction ratio is 7: 1 within
the controllable range shown in the chart below.
*2: The flange is thicker than the standard value.
If it is out of controllable range, employ two-stage pressure reduction or select another model.
When inlet pressure is 2.0MPa, make sure that reduced pressure is 0.3MPa or more.
Caution
Please collate the plate or label attached to the product with specifications of ordered
model.
* If they do not match each other, please contact us without using the product.
Reduced pressure MPa
M
P
a
Specifications Selection Chart *1
1
Controllable range
range
The valve does not fulfill specified
performance in this range.
In
le
t
p
re
s
s
u
re
