SEMPELL HIGH PRESSURE FORGED CHECK VALVES
Forged steel, swing check and tilting disc conFiguration
Operating and Safety instructions
These instructions summarise the main
warnings concerning the routine operations as
per the related installation and maintenance
manual.
STORAGE
WARNING
Storage in an open area for a limited period
can be considered only in case the valves have
appropriate packing (packed incases lined with
tarred paper, and contents well protected with
barrier sacks).
• Do not place consignment packages directly on
the ground.
• Do not expose consignment packages to the
weather or directly to the sun.
• Check the packages every two months.
HANDLING
WARNING
• Before lifting or handling the valve, make sure
you have no limitations to do it.
• For valve handling and/or lifting, the lifting
equipment (fasteners, hooks, etc.) must be
sized and selected while taking into account the
valve weight indicated in the packing list and/
or delivery note. Lifting and handling must be
made only by qualified personnel.
• Caution must be taken during the handling
to avoid that this equipment passes over the
workers or over any other place where a
possible fall could cause damage. In any case,
the local safety regulations must be respected.
INSTALLATION
IMPORTANT
• Verify that the direction of the flow of the line
corresponds to the arrow indicated on the
valve body.
• Valves without the arrow are bi-directional.
• It is recommended to perform piping flushing
before the valve installation. If this is not
possible, the valves must be set with the disc in
full open position before starting with flushing.
• If piping system is pressurized with water for
testing, and in case the piping system has been
shut down after testing for a long time, the
following recommendations should be adopted:
a. Use corrosion inhibitor with water to
pressurize the piping system
b. After testing, the piping system should be
depressurized and the test water completely
drained.
• For operating temperatures above 200°C
(392°F) a thermal insulation of the body is
recommended.
MAINTENANCE
WARNING
• Depressurize the line before starting any
maintenance. Failure to do so may cause
serious personal injury and/or damage to the
valve.
• In case of valve removal, depressurize the line
before starting any operation with the valve in
open position. Then, close the valve.
© 2017 Emerson. All Rights Reserved.Emerson.com/FinalControl VCOSI-02220-EN 18/01
SEMPELL HIGH PRESSURE FORGED CHECK VALVES
Forged steel, swing check and tilting disc conFiguration
PARTS LIST
1 Year
2 Type
3 Size
4 Class
5 N.A.
6 Body
7 Stem
8 Seat
9 Disc
10 Designer
11 Temperature
12 Pressure
13 Shell test
14 Differential pressure set up actuator
SERVICE LIMITATIONS
According to PED-ESR, par. 3.3 and related, the design pressure and temperature are indicated
on the nameplate.
IMPORTANT
• To ensure tightness of P.S. gasket, pull up bolts must be tightened when the valve is under fully
hydrostatic pressure test or twenty-four hours in operation.
• Yearly checking of bolt torque is recommended (see Tables 1 and 2).
• The segment ring has to be fixed by the safety ring. Ensure that the segment ring is in the correct
position.
15 Temperature minimum
16 Pressure at t.min
17 Temperature maxim
18 Pressure at t.max
19 N.A.
20 N.A.
21 Serial number
22 PED category
23 Fluid
24 N.A.
25 TAG
26 Order number
27 N.A.
TABLE 1 - BOLT TORQUE FOR PACKING
BOLTS
Stem diameter Bolt diameter Torque
in mm mm Nm
1 25.4 M16 14
1.25 31.75 M16 14
1.375 34.92 M20 18
1.75 44.45 M20 18
2 50.8 M24 20
2.25 57.15 M24 20
2.5 63.5 M27 23
2.75 69.85 M27 23
3 76.2 M27 23
3.25 82.55 M30 28
3.75 95.25 M33 35
TABLE 2 - BOLT TORQUE FOR BONNET
BOLTS
Stem diameter Bolt diameter Torque
in mm mm Nm
⅜ M10 30
½ M12 70
⅝ M16 140
¾ M20 260
1 M24 580
1⅛ M27 760
1¼ M30 1350
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Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.
Sempell is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson
and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be
construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by
our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without
notice.
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