Zetkama zGLO User manual

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USERS MANUAL
Stop valve zGLO
Fig. 215, 216 Edition: 07/2016
Date: 01.07.2016
CONTENTS
1. Product description
2. Requirement for maintenance staff
3. Transport and storage
4. Function
5. Application
6. Assembly
7. Maintenance
8. Service and repair
9. Reasons of operating disturbances and remedy
10. Valve service discountinuity
11. Warranty terms
1. PRODUCT DESCRIPTION
Globe valves are manufactured at different executions, they are used as stop valves, throttling valves, SDNR valves. Stop valves are
designed only for shut off and open the flow, throttling valves are designed for flow control and SDNR valves are used as non return
valves protecting the plant against back flow of medium and additionally they can shut off the flow. SDNR valves visually differ
from stop valves having cylinder stem extension on the upper end of the stem.
SDNR valve Stop valve
Stem extension
ZETKAMA Sp. z o.o.
ul. 3 Maja 12
PL 57-410 Ścinawka Średnia

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Stop valve Fig 215 A, C, E type 01
Stop valve Fig 216 A, C, E type 01

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Stop valve Fig 215 A, C, E type 31

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Stop valve Fig 216 A, C, E type 31

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Stop valve Fig 215 F, I
Globe valves are provided with casted marking according to requirements of PN-EN19 standard. The marking facilitates technical
identification and contains:
•nominal diameter DN (mm),
•nominal pressure PN (bar),
•body and bonnet material marking,
•arrow indicating medium flow direction,
•manufacturer marking,
•heat number,
•CE marking, for valves subjected 2014/68/UE directive. CE marking starts from DN32

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2. REQUIREMENTS FOR MAINTENANCE STAFF
The staff assigned to assembly, operating and maintenance tasks should be qualified to carry out such jobs. If the valve is provided
with mechanical actuators, operating manual of actuator should be obeyed. If during valve operation heat parts of the valve, for
example handwheel, body or bonnet parts could cause burn, user is obliged to protect them against touch.
3. TRANSPORT AND STORAGE
Transport and storage should be carried out at temperature from –20
0
to 65
0
C, and valves should be protected against external forces
influence and destruction of painting layer as well. The aim of painting layer is to protect the valves against rust during transport and
storage. Valves should be kept at unpolluted rooms and they should be also protected against influence of atmospheric conditions.
There should be applied drying agent or heating at damp rooms in order to prevent condensate formation. The valves should be
transported in such a way to avoid handwheel and valve stem damage.
It is not allowed to fit lifting devices to connecting holes and handwheel.
4. FUNCTION
Valves with stop disc are designed for shut off medium flow, valves with throttling disc enable to control the flow and SDNR
valves are designed to work as non return valves and enable to shut off the valve at any time as well.
Application range was mentioned at catalogue card. The kind of working medium makes some materials to be use or to be
prohibited for use.
Place of handling globe valves during the transpor
t

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5. APPLICATION
•industry
•heating
•refrigeration and air conditioning
•hot and cold industrial water
•industrial oils
•steam
•compressed air
•neutral fluids - gases and liquids of group 1 and 2 according to Regulation EC No 1272/2008 resulting from the
practice of using
* not all of the applications are suitable for all of the executions
When selecting the valve for specific medium, ”List of Chemical Resistance” can be helpful. It can be found at manufacturer
website near catalogue cards.
Valves were designed for normal working conditions. In the case that working conditions exceed these requirements (for example
for aggressive or abrasive medium) user should ask manufacturer before placing an order.
Working pressure should be adapted to maximum medium temperature according to the table as below.
Acc to EN 1092-2 Temperature [º C]
Material PN -10 do 120 150 200 250 300 350
EN-GJL250 16 16 bar 14,4 bar 12,8 bar
11,2 bar 9,6 bar ------------
EN-GJS400-18 LT
16 16 bar 15,5 bar 14,7 bar
13,9 bar 12,8 bar 11,2 bar
EN-GJS400-18 LT
25 25 bar 24,3 bar 23 bar 21,8 bar 20 bar 17,5 bar
Acc to EN 1092-3 Temperature [º C]
Material PN -10 do 120 150 200 220
CuSn5Zn5Pb5-C 6 6 bar 6,0 bar 5,0 bar 4,0 bar
CuSn5Zn5Pb5-C 10 16 bar 14,4 bar 12,8 bar
11,2 bar
CuSn5Zn5Pb5-C 16 16 bar 15,5 bar 14,7 bar
13,9 bar
Pressure acc
EN 1092-1
Temperature [º C]
Material PN -20 < do <-10 -10 do 50 100 150 200 250 300 350 400
GP240GH
40 30 bar 40 bar 37,1 bar
35,2 bar 33,3bar 30,4 bar 27,6 bar 25,7 bar 23,8 bar
Pressure acc EN 1092-1 Temperature [º C]
Material PN -60 < do <-10 -10 do 100 150 200 250 300 350 400
G-X5CrNiMo 19-11-2
40 40 bar 40 bar 36,3 bar 33,7 bar 31,8 bar 29,7 bar 28,5 bar 27,4 bar
Plant designer is responsible for valve selection suitable for working conditions.

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5. ASSEMBLY
During the assembly of balancing valves following rules should be observed:
-to evaluate before an assembly if the valves were not damaged during the transport or storage,
-to make sure that applied valves are suitable for working conditions and medium used in the plant,
-to take off dust caps if the valves are provided with them,
dust cap
-to protect the valves during welding jobs against splinters and used plastics against excessive temperature,
- steam pipelines should be fitted in such a way to avoid condensate collection; in order to avoid water hammer steam trap
should be applied
Pipeline where the valves are fitted should be conducted and assembled in such a way that the valve body is not
subjected to bending moment and stretching forces.
Bolted joints on the pipeline must not cause additional stress resulted from excessive tightening, and fastener
materials must comply with working conditions of the plant,
-during pipeline painting valve stem should be protected,
-stop valves can be assembled in any position, however it is recommended to install the valve with handwheel upwards,
-screw down and non-return valves (version with spring) can be assembled in any position, screw down and non-return
valves (version without spring) should be assembled only on the horizontal pipelines with handwheel upwards
It should be take note of medium flow direction, marked with an arrow on the body. Flow direction is established
according to the rules as below:
Stop valve SDNR valve and
throttling valve
Stop valve
PN6
–
PN25
PN6
–
PN40
PN40
under the disc
DN15
–
DN150
DN15
–
DN300
DN15
–
DN100
on the disc
DN200
–
DN300
-
DN125
–
DN200
-before plant startup, especially after repairs carried out, flash out the pipeline through entirely open valve, in order to
Flow on the
disc
Flow under the disc

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avoid solid particles or welding splinters which may be harmful for sealing surfaces,
-strainer ( wire mesh filter) installed before the valve increases certainty of its correct action.
6. MAINTENANCE
During maintenance following rules should be observed:
-startup process – sudden changes of pressure and temperature should be avoided when starting the plant,
-valve is closed by turning the handwheel clockwise when looking from above the handwheel (according to arrow
direction marked on the handwheel),
-valve is opened by turning the handwheel counter-clockwise,
It is prohibited to use additional lever when turning the handwheel ,
-performance of fitted valves can be checked by multiple closing and opening,
-if leakage on stem occurs for valves Fig.215, 216 (PN6 – PN25) it is necessary to tighten with moderate force two T-bolt
nuts pressing the packing gland until the leakage disappear, for SDNR valves Fig.215, Fig.216 (PN40) similar nuts on eye
bolts, whereas for stop valves Fig.215 (PN40) packing rings are pressed by tightening threaded gland nut screwed in the
bonnet, the nut press the rings by gland,
-in the case of necessity to replace packing rings, it should be done without overpressure inside the valve, when the valve is
completely open. In this position inner space of the valve is entirely shut off : stop valves are provided with back seat on
the upper part of disc which adheres to bonnet seat, SDNR valves are provided with flange on the stem which adheres to
bonnet seat,
-in order to refill packing rings of valves Fig.215 i 216 (PN6 – PN25) unscrew the nuts on T-bolts, move the gland into
handwheel direction, working under lifted gland refill cut - packing rings in the stuffing box, then press again these cut
packing rings. There are similar procedures for SDNR valves Fig.215 , Fig.216 (PN40) but there are eye bolts instead of
T-bolts that can be swing aside. For stop valves Fig.215 (PN40) packing can be refilled when gland nut is unscrewed.
open
shut off
Tighten the nuts

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- valves in which there is an inflow over the disc are equipped with a balancing disc as shown below. Turning the handwheel to the
left raises the balancing disc which results in equalization of upstream and downstream pressure. After pressure equalization the
valve can be opened completely. The balancing disc operation is effective only in closed systems. In an open system where it is
impossible to equalize pressure the balancing is ineffective. In this case, one should consider introduction of other structural
solutions, e.g. a by-pass.
- The maximum differential pressure that can apply on both sides of the closing valve (the valve is closed) in valves where
there is flow under the plug see in the table below.
PN differential pressure [bar]
DN15-100 DN125 DN150 DN200 DN250 DN300
6 6 6 6 6 6 6
16 16 16 16 14 9 6
25 25 25 21 14 9 6
40 40 33 21 14 9 6
In order to assure safety performance, each valve (especially rarely used) should be surveyed on regular basis.
Inspection frequency should be laid down by user, but not less than one time per month.
7. SERVICE AND REPAIR
All service and repair jobs should be carried out by authorized staff using suitable tools and original spare parts. Before
disassembly of complete valve from the pipeline or before service, the pipeline should be out of operation. During service and
repair jobs it is necessary to decrease pressure to 0 bars , valve temperature to ambient temperature and to use personal health
protectives in pursuance of existing threat. After valve disassembly it is necessary to replace flange connection gaskets between
valve and pipeline.
Lift up the gland
Fill the gland packing
D
isc
Balancing disc

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Precautions should be taken when touching gasket between body and valve bonnet. The gasket contains stainless
steel stripe that may cause injury,
Gasket
Everytime when valve bonnet was disassembled sealing surface should be cleaned. During assembly it should be applied new
gasket of the same type as previously used. Body-bonnet bolt connections should be tighten when the valve is at open position.
The bolts should be tighten evenly and crosswise by torque wrench.
-Tighten torques
Ścrew Torque
M8 15-20 Nm
M10 35 -40 Nm
M12 65 – 70 Nm
M16 140 -150 Nm
-before valves re-assembly in the pipeline it is necessary to check valve operation and tightness of all connections.
Tightness test should be carried out with water pressure of 1,5 nominal pressure of the valve.

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9. REASONS OF OPERATING DISTURBANCES AND REMEDY
-When seeking of valve malfunction reasons safety rules should be strictly obeyed
Fault Possible reason Remedy
No flow Valve closed Open the valve
Flange dust caps were not removed Remove dust caps on the flanges
Poor flow Valve is not open enough Open the valve
Dirty filter Clean or replace the screen
Clogged pipeline Check the pipeline
Control difficulties Dry stem Grease the stem
Gland packing tighten too much Slightly slacken gland nuts. Put attention to
keep stuffing box tightness
Stem leakage Too much loose on the gland
Tighten the gland until tightness will
be reached
If necessary add packing rings in
stuffing box. Keep special caution.
Seat leakage Shut off not correct
Tighten the handwheel without any
auxiliary tools
Seat or disc damage Replace the valve and contact supplier
or manufacturer
Apply the valve with balancing disc.
Check if the valve was assembled
according to arrow direction marked
on the valve .
Pressure difference too much
Clean the valve. Fit strainer before the
valve.
Medium polluted with solid particles
Broken connecting flange
Bolts tighten unevenly Replace the valve with new one
10. VALVE SERVICE DISCOUNTINUITY
All obsolete and dismantled valves must not be disposed with household waste. ZETKAMA valves are made of materials which can
be re-used and should be delivered to designated recycling centers .
11. WARRANTY TERMS
- ZETKAMA grants quality warranty with assurance for proper operation of its products, providing that assembly of them is done

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according to the users manual and they are operated according to technical conditions and parameters described in ZETKAMA’s
catalogue cards. Warranty period is 18 months starting from assembly date, however not longer than 24 months from the sales date.
- warranty claim does not cover assembly of foreign parts and design changes done by user as well as natural wear.
- immediately after detection the user should inform ZETKAMA about hidden defects of the product
- a claim should be prepared in written form.
Address for correspondence :
ZETKAMA Sp. z o.o.
ul. 3 Maja 12
57-410 Ścinawka Średnia
Phone [phone]
Fax [phone]
Website: www.zetkama.com