-
EFVs
with TCO
max. 1 mbar
pressure
drop
* DVGW-TRGI 2018 and the DVFG-TRF 2012:German mandatory
technical regulation for the planning, construction, modification
and servicing of natural gas (TRGI) and liquid gas (TRF)
installations.
** Pressure Equipment Directive (97/23/EC): Directive of the
European Parliament and of the council relating to simple pressure
vessels.
*** DIN 30652-1 DVGW (VP 305-1)Excerpt of DVGW-TRGI 2018 that
prescribe the German standard for excess flow valves in residential
installations.
EFV
max. 0.5 mbar
pressure
drop
SENTRY GT Maxitrol Company’s new SENTRY GT model is specifically
designed for legacy installations by providing a direct con-nection
to the outlet of the emergency control valve (ECV), incorporating a
high temperature resistant gasket for BS746 thread connections.
SENTRY GT TCOs automatically shut off the gas flow at
tem-peratures between 92 °C and 100 °C. At the release
tempera-ture, the release mechanism (temperature sensor) unblocks
the closing unit, and the closing unit moves into the valve seat
resulting in a gas-tight seal. They remain closed for a period of
at least 30 minutes at temperatures up to 650 °C (tested up to
925 °C) and after it cools.
SENTRY GT with internal thread in accordance with BS746
con-tains an integrated high temperature resistant gasket at the
inlet.SENTRY GS EFVs and SENTRY GT TCOs are available combined as a
single unit or separately as individual units.
These cut-off devices help prevent gas from flowing to
down-stream components that may not be resistant to high
tempera-tures. When tripped the SENTRY GT allows no more than
30 l/h measured in air to pass through or escape from the
device.
SENTRY GT TCOs meet the requirements of:¡ General Gas Guidance
IGEM/G/5 Gas in multi-occupancy
buildingsand are certified according to:¡Pressure Equipment
Directive 97/23/EC **¡DIN 3586
SENTRY GS Calibrated SENTRY GS EFVs for residential installation
shut off the gas flow when a predefined closing flow rate is
reached. Mertik Maxitrol’s factory adjustment (100 %) provides a
pre-cise and reliable closing flow rate. In the nominal flow range,
the EFV remains in a stable, open position. SENTRY GS are also
available in combination with a thermal cut-off device.
The EFV is installed downstream of the emergency control valve
(ECV). If equipped with a by-pass orifice, SENTRY GS EFVs reopen
after the downstream line has been repaired and re-pressurized.
SENTRY GS EFVs meet the requirements of:¡General Gas Guidance
IGEM/G/5 Gas in multi-occupancy
buildings¡German DVGW TRGI 2018 * ¡German DVFG TRF 2012 * and
are certified according to:¡Pressure Equipment Directive
97/23/EC **¡German DIN 30652-1 (VP 305-1)***
In accordance with the IGEM/G/5 Gas in multi-occupancy
buildings
SENTRY GS Excess Flow Valves and SENTRY GT Thermal Cut-off
Devices
From left to right: SENTRY GS models GS20HH6LCZ, GS20HT6ACZ
(with TCO) and GS20HT6AAZ (with TCO); SENTRY GT model GT20BLC0
TCO
for legacy
installations
© 2
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Mer
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& C
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G, A
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ved.
-
600CWPPN40MS58
600
600
CWP
CWP
PN40
PN40
MS58
MS58
600
CWP
PN40
MS58
600
CWP
PN40
MS58
600
CWP
PN40
MS58
600
CWP
PN40
MS58
600
CWP
PN40
MS58
600
CWP
PN40
MS58
MODELS / DIMENSIONS
SPECIFICATIONS (See label attached to SENTRY GT)¡Gases: Suitable
for gases according to EN 437¡Ambient Temperature: - 20 °C to
+ 80 °C (open) ¡Release Temperature: + 100 °C to 8 K¡Nominal
Pressure: MOP 5 (PN 5)¡Allowable Leakage:
-
PRESSURE DROPPRESSURE DROP OF FLOW RATES OF SENTRY MODELS
PRESSURE DROP OF FLOW RATES SENTRY GT MODELS
Pres
sure
Dro
p [m
bar]
Flow Rate [m3/h] Air (d=1)
1 2 3 4 5 10 15
1.0
0.7
0.5
0.3
0.2
0.1
1.25 2.50 3.75 5 6.25 12.5
GS20HT6ACZGS20HT6AAZ
GS20HH6LCZ
GT20DIAGT20BLC0
GT25DIA
Flow Rate [m3/h] Gas (d=0.64)
© 2
020
Mer
tik M
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mbH
& C
o. K
G, A
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ight
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eser
ved.
Pres
sure
Dro
p [m
bar] 20
10
5
1
0.025 8 10 15 300100 500 2,000
Flow Rate [m3/h] Gas (d=0.64)
GT32
GT40
GT50
25 50 75
Flow Rate [m3/h] Air (d=1)
-
Mertik Maxitrol GmbH & Co. KGWarnstedter Str. 306502
Thale | GermanyTel.: (+49) 3947 400-0Fax: (+49) 3947 400-200
[email protected]
Mertik Maxitrol GmbH & Co. KG The Valleys Innovation
CentreAbercynon, South Wales CF45 4SN | UKTel.: (+44) 1443 742
755Mobile: (+44) 7866-492
[email protected]
Illustration TypeOrder Code
Connections Surface Dimensions[mm]
Weight[kg]
Cert. No.
Inlet Outlet L1 L2
GT20BLC0 3/4BS746
3/4BS746
blue galvanized 45.0 33.0 36 0.136
CE-0
085B
N039
4
GT10DIA0GT15DIA0GT20DIA0
Rp 3/8Rp 1/2Rp 3/4
R 3/8R 1/2R 3/4
blue galvanized40.040.050.3
28.424.734.0
222732
0.050.070.10
DG-4
340A
Q123
6CE
-008
5BN0
394
GT25DIA2 Rp 1 R 1 black galvanized 53.8 34.6 41 0.21
GT15DII0GT20DII0
Rp 1/2Rp 3/4
Rp 1/2Rp 3/4 blue galvanized
45.554.5
---
2732
0.100.15
GT25DII2 Rp 1 Rp 1 black galvanized 61.5 - 41 0.30
GT32IA4GT40IA4GT50IA4
Rp 1 1/4Rp 1 1/2Rp 2
R 1 1/4R 1 1/2R 2
nickel plated
100.0112.0135.0
21.421.425.7
556580
0.761.462.52
DG-4
340A
Q126
0CE
-008
5BN0
395
GT32II4GT40II4GT50II4
Rp 1 1/4Rp 1 1/2Rp 2
Rp 1 1/4Rp 1 1/2Rp 2
100.0112.0135.0
---
556580
1.141.762.60
GT32FF4GT40FF4GT50FF4GT65FF4GT80FF4GT100FF4*GT125FF*GT150FF*
DN 32DN 40DN 50DN 65DN 80DN 100DN 125DN 150
DN 32DN 40DN 50DN 65DN 80DN 100DN 125DN 150
nickel plated
138.0155.0175.0197.0229.0267.0224.0268.0
--------
--------
2.503.706.107.80
11.0015.3026.0032.00
GT15KD40GT20KD40
Rp 1/2Rp 3/4
Rp 1/2Rp 3/4
nickel plated /blue galvanized
75.590.0
--
2732
0.250.40
DG-4
341A
T005
2
GT25KD40 Rp 1 Rp 1 nickel plated / black galvanized
121.0 - 41 0.75
GT32KD40GT40KD40GT50KD40
Rp 1 1/4Rp 1 1/2Rp 2
Rp 1 1/4Rp 1 1/2Rp 2
nickel plated185.0207.0246.0
---
556580
1.622.543.86
* despatch only by forwarder
Flange Connection
Internal Thread External Thread
L1
L1
L1L2
ALL SENTRY GT MODELS / DIMENSIONS
For more information please refer to our literature “SENTRY
GT/SENTRY GT..KD40 thermally activated Shut-off Devices and Ball
Valves” (literature code GTKD-LT-EN…) available at
www.mertikmaxitrol.com .
© 2
020
Mer
tik M
axitr
ol G
mbH
& C
o. K
G, A
ll R
ight
s R
eser
ved.
GS
H.G
T-LT
-EN
-01.
2020
-UK
Mertik Maxitrol GmbH & Co. KGIndustriestr. 1 48308
Senden | GermanyTel.: (+49) 2597 9632-0Fax: (+49) 2597 9632-99
[email protected]
Maxitrol Company (Exclusive Agent)23555 Telegraph Road|P.O. Box
2230Southfield, MI 48037-2230 | USATel.: (+1) 248 356-1400Fax: (+1)
248 [email protected]
Wrench Size
Internal Thread Internal Thread
Internal Thread External Thread
Internal Thread
Internal Thread Internal Thread
L1L2
L1
L1
DN150 with protection basket
Internal Thread External ThreadL1L2
