INSTRUCTIONS

FOR INSTALLATION,
OPERATION
AND MAINTENANCE OF

Globe Stop Valves according

to BS 1873 and API 623 [VBS]
TERMOVENT SC Instruction for installation, operation and maintenance Globe Stop Valves acc. to BS 1873 and API 623

Table of Contents

1. General safety information’s _____________________3

2. Product description _____________________________3

3. Transport and storage ___________________________6

4. Installation and start-up _________________________7

5. Usage and maintenance _________________________9

6. Service and repair _____________________________11

7. Possible malfunctions and solutions ____________12

8. Guarantee _____________________________________13

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TERMOVENT SC Instruction for installation, operation and maintenance Globe Stop Valves acc. to BS 1873 and API 623

1. General safety information’s

Instructions for installation, start-up and maintenance during the period
of exploitation of valves manufactured in the “Termovent SC” should be
used as a manual intended for all personnel directly or indirectly involved
in dealing with the aforementioned goods.

These instructions are only related to Globe Stop Valves according to BS

1873 and API 623.

Operators in charge of installation, operation and maintenance of valves

during the period of use, should be fully trained for the correct / optimal
performance of these tasks. If valves are equipped with mechanical
actuators, the operator should be trained for the adequate operation of
such valves.

Because valves in working conditions have hot parts (handwheel, body

and bonnet) and may cause burns, the operator has an obligation to
undertake all necessary precautions to avoid such by using protective
facilities.

Before the service or reinstallation of the valves, the plant or installation

should be taken out of operation (pressure 0 bar, temperature of valves
should be the same temperature as the environment).

These products are recyclable. No ecological hazard is anticipated with

the disposal of these products providing due care is taken.

2. Product description
The main purpose of the valves is to isolate fluid flow through pipeline
(shut-off Valves).

If anything is unclear at the time of installation, start-up or during use,

and not covered in these instructions, the departments of the
“Termovent SC” should be contacted directly in order to obtain the
required support.

All valves manufactured in “Termovent SC” are marked with following

marks:

• Identification of manufacturer (“Termovent SC” logo);

• Nominal diameter of valve NPS (inch) or DN (mm);

• Nominal pressure Class rating (#);

• Material designation of body and bonnet;

• Body and bonnet melt identification/heat number;

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TERMOVENT SC Instruction for installation, operation and maintenance Globe Stop Valves acc. to BS 1873 and API 623

• Trim identification- material grade for stem, disc and seat;

• Unique serial number;

• Arrow mark for allowable direction of flow;

• Maximum allowable pressure at maximal temperature

• Date of manufacture (month and year) ;

• The product standard designation: BS 1873 or API 623;

• Valve ends flanges and body/bonnet flanges grooved with ring joints
corresponding ring number;

• CE marking (if it is manufactured in accordance with

2014/68/EU(PED 97/23/EC));

• API marking (if it is manufactured in accordance with API

Specification)

• Other marks in accordance with customer request or product

standard.

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 TERMOVENT SC Instruction for installation, operation and maintenance Globe Stop Valves acc. to BS 1873 and API 623

Handwheel
Nut
Handwheel

Stem Nut

Gland Bolts
Nut
Gland Pin
Gland Flange
Bonnet Gland Nuts
Backseat Bushing
Bonnet gasket Packing Gland
Stem
packing
Stem Disc Nut

Disc
Closure
Stud Bolt Member

Nameplate Body Seat

Body

Fig. 1 Parts names

Class 150: Disc < NPS 8 ≥ Relief disc

Class 300: Disc < NPS 6 ≥ Relief disc
Class 600: Disc < NPS 3 ≥ Relief disc
Class 900: Disc < NPS 3 ≥ Relief disc
Class 1500: Disc < NPS 3 ≥ Relief disc

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TERMOVENT SC Instruction for installation, operation and maintenance Globe Stop Valves acc. to BS 1873 and API 623

Table 1
Pos. Part Name Quantity Spare Parts
1 Body 1
2 Bonnet 1
3 Disc* 1
4 Stem 1
5 Stem Nut 1
6 Stud Bolts **
7 Nuts **
8 Bonnet Gasket 1 Yes
9 Stem Packing 1 Yes
10 Gland Bolts 2
11 Gland Nuts 2
12 Handwheel 1
13 Gland Pin 2
14 Packing Gland 1
15 Gland Flange 1
16 Handwheel Nut 1
17 Body Seat 1
18 Disc Nut 1
19 Backseat bushing 1
20 Nameplate 1

* 3-relief disc, 3a-disc

** Quantity depend from DN and PN or Class

3. Transport and storage

Transport and storage of valves should be performed at a temperature
between -20°C to +60°C and should be protected against outer and
atmospheric influences, as well as protecting painted surfaces against
damage. The purpose of painted surfaces is to protect valves against
corrosion during transport and storage.

The basic version of valves are protected with particular/special paints

applied to the outer parts and protective preservatives inside. As such,

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TERMOVENT SC Instruction for installation, operation and maintenance Globe Stop Valves acc. to BS 1873 and API 623

any corrosion is prevented for a period of 6 months. Protection for

special conditions is applied only with prior agreement.

It is recommended to store the valves in closed, dry and ventilated

storage facilities and to protect valves against any atmospheric
influence. In order to avoid the appearance of corrosion before the
expiry of protection it is necessary to store the valves on a pallet/crate or
other appropriate place.

WARNING !!!

▪ You must not lift the valves using the connection flange holes or
the handwheel – you should use lifting straps to secure the valves
to the lifting equipment;
▪ You must not remove the protection covers from the valve
connection ends;
▪ It is not advisable to store the valves in the ‘open’ position - store
them in the ‘closed’ position.

4. Installation and start-up

Valves are delivered with their disc in the closed position and they are
ready for use. After the removal of the protection covers it is necessary
to thoroughly clean inside the valve with compressed air without first
opening the valve.

Closure of a valve is performed by turning the handwheel in a clockwise

direction. On the handwheel is an arrow and the letter “C” indicating the
closing direction, and another arrow and the letter “O” indicating the
opening direction.

When installing valves with flanged ends it is necessary to take into

consideration the selection of adequate bolt material and the
appropriate type of gasket depending on the type of working fluid,
pressure, temperature, and the type of flange facing. It is necessary to
install gaskets strictly in accordance with instructions given from the
manufacturer of the gaskets.

Valves with welding ends should be welded onto the pipeline by an

expert and with appropriate WPS. After welding, if necessary, local
normalization should be performed and the inside of the pipeline should
be cleaned to remove possible welding remains.

At the moment of installation the influence of the load of the pipeline on

the valve should be reduced. The same also applies for temperature
oscillation, hydraulic impact and similar. The valve should not be used as
a support for a pipeline.

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TERMOVENT SC Instruction for installation, operation and maintenance Globe Stop Valves acc. to BS 1873 and API 623

It is important to take care about the flow direction at the time of

installation. The flow direction is indicated with the arrow mark casted or
imprinted on the body of the valve.

After assembling every single product is hydraulically tested which may

cause swelling of the stem packing. This appearance could affect harder
manipulation with hand wheel before products installation. Subsequently
installation of the product on pipeline and after operating conditions are
achieved, hand wheel manipulation became regular. This kind of
appearing does not affect the functionality of the product.

It is possible after the installation, start-up and operating parameters are

set to detect a leakage on the stem packing. In this case it is necessary
to tighten the gland nuts equally. The tightness should not exceed more
than necessary to allow comfortable manipulation of the valve (opening /
closing). If it is necessary, new stem packing rings of the same quality
should be added to the packing.

WARNING !!!

▪ After assembling every single product is hydraulically tested which

may cause swelling of the stem packing. This appearance could
affect harder manipulation with hand wheel before products
installation. Subsequently installation of the product on pipeline
and after operating conditions are achieved, hand wheel
manipulation became regular. This kind of appearing does not
affect the functionality of the product;
▪ You must not lift the valves using the connection flange holes or
the handwheel at the moment of the installation the valve on the
pipeline – you should use lifting straps to secure the valves to the
lifting equipment;
▪ Before installation the impurities should be removed from the
pipeline or from the appliance;
▪ Remove protecting covers from the valve ends, degrease and
clean the inside of the valve, and in case of a flanged connection,
carefully clean the sealing surfaces;
▪ Confirm that the marks on the valve correspond to the projected
parameters of the plant (e.g. size, pressure, material etc.) and
installation is according to allowable flow direction;
▪ Confirm that the velocity of the fluid at the place of the installation
is in range of the recommended velocity;
▪ During the installation check if there is enough space for normal
and safe manipulation;
▪ At the moment of testing of a pipeline or an installed appliance
valve; take care about the predicted maximal differential pressure.

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TERMOVENT SC Instruction for installation, operation and maintenance Globe Stop Valves acc. to BS 1873 and API 623

5. Usage and maintenance

It is convention during usage of the valves that all minor defects, if
operating conditions allow, should be repaired on the spot. If not, the
valve should be dismantled from the site in order to perform a full repair.
If the valve is severely damaged it should be replaced with a new one.
Such repairs protect valves against further deterioration, being
permanently out of work and being the cause of severe accidents in the
plant.

The valve stem packing should be the subject of particular attention as it

is important for the qualitative maintenance of tightness and should be
periodically checked. If leakage at the stem packing is detected, the
gland nuts should be tightened slowly (Fig. 2). When gland nuts are
tightened, if the gland falls down more than twice the packing ring
height, new packing rings should be added to the stem packing.

Fig.2 Stem packing gland tightening

After a longer period of use, the valve stem packing becomes rigid and
unusable so a replacement should be done. When the replacement of
stem packing is performed, remains of the old packing should be
removed carefully and the sealing chamber should be thoroughly
cleaned before the new packing is installed. The packing rings of the
new stem packing should be identical in quality as before, especially for
valves with high working parameters. Individual packing rings should be
used for stem packing (Fig. 3) and arranged in a manner that the
connection of one ring is at angle of 90° to the connection of next one.

!
Fig.3 Stem packing ring

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TERMOVENT SC Instruction for installation, operation and maintenance Globe Stop Valves acc. to BS 1873 and API 623

In case of leakage through gaskets between valve connection flanges or

between the bonnet and body, it is necessary to make replacements of
the gaskets as soon as possible to prevent damage of the sealing
surfaces due to erosion.

The valves equipped with grease nipple should be lubricated every

month, or twice a year, if they are rarely used. It is recommended to
replace the grease in bushes during every general overhaul or during the
pipeline revision. The type of grease depends on the temperature in the
plant. Remote controls, bushings and gearboxes should be lubricated
depending on how frequently they are used, every six or twelve months.

Valves delivered with actuator is adjusted for proper work. Globe valves
delivered with connection for later build on it the electric actuator must
be adjusted. Closing of globe valves should be adjusted by torque
switch and the opening by limit switch. The setting of torque and limit
switches must be in accordance with the instructions of the
manufacturer of the actuator.

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TERMOVENT SC Instruction for installation, operation and maintenance Globe Stop Valves acc. to BS 1873 and API 623

WARNING !!!

▪ During usage stop valves must be completely in an open or closed

position;

▪ If, when a valve is overhauled, a decrease of wall thickness of more

than 30% is detected at any of the ports (due to erosion) the valve
should stop being used;

▪ Any time when a valve is dismantled or reinstalled the gaskets

should be replaced with new ones with the appropriate quality;

▪ Valve opening and closing by handwheel, should be done without

use of auxiliary means such as a rod or similar;

▪ Valve maintenance and manipulation during use should be done

only by experts and persons well trained for such purpose;

▪ At the moment of installation of the plant sudden and extreme

change of pressure and temperature should be avoided;

▪ A Strainer being installed before the valve will increase its reliability
and proper working.

6. Service and repair

Only authorized persons should perform service and repair with
appropriate tools and, if it is possible, using original spare parts.
Personal protection should be applied in accordance with valid
regulations and legalizations.

Attention should always be paid to the reliability of the valves and

parameters of the working implementation / plant, and only materials
which can successfully replace those originally installed should be used.

For highly reliable valves (valves which work with high temperatures,
high pressures or with dangerous fluids) any service, repair or
replacement should be done professionally and responsibly in
accordance with valid regulations for safe working conditions at the
plant.

Before the service or reinstallation of the valves, the plant or installation

should be taken out of operation (pressure 0 bar, temperature of valves
should be the same temperature as the environment).

Every Globe Valve serviced or repaired should be subject to all

necessary tests usually performed for a newly produced Globe Valve.

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TERMOVENT SC Instruction for installation, operation and maintenance Globe Stop Valves acc. to BS 1873 and API 623

Bolts for connection between body and bonnet should be tightened

evenly and crosswise applying appropriate torque when the Globe Valve
is in the open position.

Possible torques for tightening are listed in Table 2 and the selection of
torque depends on the material grade of bolts and nuts used, as well as
the quality of the gasket of the bonnet.
Table 2

Nut M8 M10 M12 M14 M16 M20 M24 M27 M30 M33 M36

Torque
8÷20 15÷40 26÷65 42÷100 64÷150 125÷300 210÷500 305÷730 410÷1000 550÷1350 710÷1720
(Nm)

WARNING !!!

▪ Gaskets between the body and bonnet of the valves should be

manipulated with high precautions because they could contain
stainless steel wire which can cause severe injuries.

7. Possible malfunctions and solutions

During the period of usage of the installed valve malfunctions may occur.
Only experts in the premises of the user should undertake repairs. The
most common cause of malfunctions and how to overcome such
situations is listed in Table 3.

Table 3.
Failure Possible cause Troubleshooting
Valve is in closed position Open the valve
Remove protection
Protection covers are not
covers from connection
removed
ends
Absence of flow Open the valve
Globe valve is not
completely with
completely open
handwheel (Pos.12)
Check and clean valve
Dirty valve or pipeline
or pipeline
Dry stem (Pos. 4)/stem nut
Grease stem (Pos.4)
(Pos.5)

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TERMOVENT SC Instruction for installation, operation and maintenance Globe Stop Valves acc. to BS 1873 and API 623

Difficult Slightly loosen Gland

manipulation nuts (pos.11) with
Gland nuts (Pos.11) are
precaution to preserve
too tight
sealing of the stem
packing (Pos.9)
Nuts (Pos.7) are not
Tighten Nuts (Pos.7)
tightened
Leakage on Disassemble bonnet
bonnet gasket Bonnet gasket (Pos.8) is (Pos.2) and replace
damaged bonnet gasket (Pos.8)
with new one
Gland nuts (Pos.11) are Tighten Gland Nuts
not tightened (Pos.11)
Completely open the
Leakage on valve and carefully add
stem packing new stem packing rings
Stem packing (Pos.9) lost
to original stem packing
own functionality
(Pos.9) or replace
whole stem packing
(Pos.9) with new one
Turn handwheel (Pos.
Valve isn’t completely 12) in direction
closed indicated for closing
without auxiliary means
Mechanical damages of Contact the
seat or disc manufacturer
Check installed valve
Leaking on seat allowable flow direction.
Differential pressure to For valves without relief
high disc check maximum
allowable differential
pressure.
Clean Valve thoroughly.
Working medium contains We recommend
solid dirt particles installation of Strainer
before Globe Valve

8. Guarantee
The Guarantee issued by “Termovent SC” confirms the safe working of
its products under conditions when these products are properly installed
in accordance with the instructions in the documentation given to the

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TERMOVENT SC Instruction for installation, operation and maintenance Globe Stop Valves acc. to BS 1873 and API 623

customer, and usage is in accordance with approved technical

conditions and working parameters.

The Guarantee is void if inappropriate parts from other manufacturers

are implemented, if the user changes construction, or if there is any
decline in function or malfunction due to natural wear and tear.

Guarantee conditions:

The Guarantee is valid for defective parts or defective products, when

any such defect is confirmed by an expert engaged by the customer and
approved by experts from our company. In such a situation
“Termovent SC” will replace the defective part(s) or defective product(s).

Replacement of defective part(s) or defective product(s) with new one(s)

should be done only by an expert engaged by the customer upon
approval or by instruction of our experts and in accordance with the
instructions for installation.

The Guarantee period is not valid if installation and manipulation of the

valves isn’t in accordance with these instructions. The Guarantee period
for all replaced parts or product(s) starts from the moment the
replacement(s) is/are done.

Guarantee is valid only for following

storage and maintenance conditions:

Crate and pallets with valves should be stored indoors in a building with
access limited to authorized personnel only. In the case of an
inappropriate storage place crates (or pallets) should be stored under an
awning and should be protected against rain and moisture with an
appropriate waterproof cover, again with access limited to authorized
personnel only.

Valves should only be taken out of a crate or removed from the covering
of a pallet just before installation and only quantity to be installed should
be taken out / removed. After the valves for installation are taken out of a
crate (or pallet) the crate/pallet should be closed/covered again.

Do not remove the protector covers from valves until installation.

Valves prepared for installation should be manipulated and transported

in a careful manner to prevent possible mechanical damage.

WARNING !!!

▪ After detection of mistakes “Termovent SC” should be informed

immediately.

▪ Claims must be made in writing.

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