Non return valve Dubex
Installation and maintenance instructions
Emerson reserves the right to change the contents without notice
RMISB-0014-EN-1306
Please read these instructions carefully.
This symbol indicates important
messages and safety instructions.
Intended valve use
The valve is intended to be used in
applications within the pressure/temperature
limits as indicated in the P/T diagram of the
product manual only.
3. Installation
WARNING
For safety reasons it is important to take the following precautions before starting to work on
the valve:
1. Personnel making any adjustment to the valves should utilize suitable equipment. All required
personal protection means should be worn.
2. The line must be depressurized before installing the valve.
3. Installation and handling of the valves should only be done by personnel that is trained in all
aspects of manual and mechanical handling techniques.
4. Misuse of the valve is not allowed. The valve, handles, actuators and other parts may not be
used as ‘climbing tools’
5. Ensure that valve pressure/temperature limitations marked on the valves tagplate are within
the service conditions. The trim number on the valves tagplate identifies the valve materials.
See product manual for valve specific P/T diagram and trim number definition.
6. Ensure that valve materials are compatible with the pipeline fluid.
7. The valve has to be installed in a horizontal pipeline with the shafts horizontal.
3.1. Visual valve inspection
1. Confirm that the materials of construction listed on the valve tagplate are appropriate for the
service intended are as specified.
2. Tagplate identification
Fabricator
Emerson RMI
Figure
DBX NRV
Material trim
e.g. 804
Direction
U(nidirectional) or B(idirectional)
Size
e.g. DN1000
Tag no.
If required
Design pressure
e.g. PN16
Design temperature e.g. -20°C to +80°C
Year of construction e.g. 2004
Mass
e.g. 2500 kg
3.2. Flange and pipe compatibility
Check matching of flange drilling pattern of valve and pipe flange before assembly.
Flanges have to meet the following requirements:
• The face inside diameter should be:
D min: The valve Q dim adequate disc clearance.
D max: The inside diameter (ID) of standard pipe for the nominal size ISO 4200.
Use flange bolting in agreement with appropriate standard.
1. Storage and handling
1.1. Storage
Storage should be off the ground in a clean, dry, indoor area.
1.2. Handling
To prevent damage during lifting the valves should be lifted with appropriate lifting
equipment. Valves are shipped with counterweight disassembled. The disc is secured against
inadvertent movement. Remove securing device after mounting the counterweight. Possible
flange protection caps need to be removed prior to mounting it in the pipeline. Lift the valve
with great care from the transport package (crate, pallet). Prevent any damage to the valve,
the pneumatic/electric/hydraulic actuator or any other instrumentation.
Q
max/min
2. Spare parts
Only original RMI spare parts are allowed to be used. Safe operation can not be guaranteed if third
party spare parts are used.
Sales order number
Size
Uni- or Bidirectional
Material identification
Type of valve
KEYSTONE
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