Functional Description; Construction; Type Plate; Installation And Operation - GEM N086 Installation, Operating And Maintenance Instructions For The Installer And The User

9

Functional description

The GEMÜ N086 and N186 pressure retain-
ing valves are used to provide a
constant back pressure in process plant.
If the inlet pressure rises above a preset
value, the diaphragm is raised against
the spring force. The valve opens and the
excess pressure can escape into the out-
let line. If the pressure on the inlet side is
reduced, the valve closes as the spring
force pushes the diaphragm against the seal
seat. The spring force can be adjusted as
required using a set screw and secured with
the lock nut.
10

Construction

2
Construction GEMÜ N086, N186
1 Valve body
2 Valve bonnet
3 Diaphragm
10 Cap
N086, N186
10.1

Type plate

Device version
Traceability number
Item number
The month of manufacture is encoded in
the traceability number and can be obtained
from GEMÜ.
The product was manufactured in Germany.
11

Installation and operation

Prior to installation:
10
Ensure that valve body and diaphragm
G
material are appropriate and compatible
to handle the working medium.
See chapter 6 "Technical data".
11.1

Installing the valve

3
The equipment is subject to pressure!
® Risk of severe injury or death!
1
Only work on depressurized plant.
G
Corrosive chemicals!
® Risk of caustic burns!
G
Hot plant components!
® Risk of burns!
G
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Design in accordance with order data
Device-specific data
12103529 I 0001
Serial number
WARNING
WARNING
Wear appropriate protective
gear when installing.
CAUTION
Only work on plant that has
cooled down.