SENTRY Legacy GT™ TCO + GS EFV for UK

SENTRY – GT TCO & GS EFV

for new and legacy installations in the UK

SENTRY Legacy GT™ TCO + GS EFV

SENTRY Legacy GT TCO
& GT TCO + GS EFV

For LEGACY Installations in the UK

The thermal cut-off device (GT20BLC0) for legacy instal­la­tions is available as an individual unit

The Legacy GT thermal cut-off device in combi­nation with a SENTRY GS excess flow valve (GS20HT6LCZ) is the first TCO that can be screwed directly onto the outlet of a gas meter emergency control valve (ECVs with BS 746 connections).

This product was specif­i­cally designed for existing instal­la­tions in the UK and can be installed without disrupting the gas supply to neigh­boring properties.  It provides additional protection to a meter instal­lation with <1.0 mbar (10 kPa) pressure drop.

  • Product Code:
    • GS20HT6LCZ (Legacy TCO + EFV)
    • GT20BLC0 (Legacy TCO)
  • Thread Connections
    • L – Internal thread in accor­dance with BS746
    • C – External thread in accor­dance with BS746
  • Fuel Gases: Suitable for gases according to EN 437
  • Ambient Temperature Range: 
    • ‑20°C to 60°C (Legacy TCO + EFV)
    • ‑20°C to 80°C (Legacy TCO)
  • Release Temperature Range: 100°C — 8 K
  • Thermal Rating: 30 min up to 650°C in compliance with DIN 3586
  • Nominal Pressure:
    • MOP 0.1 (SENTRY GS EFV max. 100mbar/10kPa)
    • MOP 0.2 (with BS 746 inlet thread max 200 mbar / 20 kPa)
  • Allowable Internal Leakage: < 30 l/h (Air) to pass through closed device.
  • Housing Material: Steel
  • Complies with the new IGEM/G/5 Edition 3, 2022 for gas in multi-occupancy buildings.
  • Pressure Equipment Directive (2014/68/EU)
  • Following DIN 3586:2003 (SENTRY GT)
  • Following DIN 30652–1 (SENTRY GS) Closing factor fs: fs<1.45 (Type K)
  • Following German DVGW-TRGI 2018 and DVFG-TRF 2021

SENTRY GT TCO
& GT TCO + GS EFV

For NEW Installations in the UK

SENTRY GT TCO + SENTRY GS EFV is a thermal cut-off device (TCO) combined with an excess flow valve (EFV) as a single unit.  This product was designed for new instal­lation in the UK.


SENTRY GT thermal cut-off devices (TCO) help prevent gas from flowing to downstream compo­nents that may not be resistant to high temper­a­tures. SENTRY GT TCOs automat­i­cally shut off the gas flow at temper­a­tures between 92 °C and 100 °C.

At the release temper­ature, the release mechanism (temper­ature sensor) unblocks the closing unit, which then moves into the valve seat resulting in a gas-tight seal. The SENTRY GTs™ remain closed for a period of at least 30 minutes at temper­a­tures up to 650 °C (Maxitrol tested up to 925 °C) and after it cools.

SENTRY GT can be installed upstream or downstream of the emergency control valve (ECV). This product is designed for new instal­la­tions in the UK.

  • Product Codes: GS20HT6ACZ, GS20HT6AAZ
  • Thread Connections:
  • A – External thread in accor­dance with DIN EN 10226–1/ISO 7–1 (conical)
  • C – External thread in accor­dance with BS 746
  • Fuel Gases: Suitable for gases according to EN 437
  • Ambient Temperature Range: — 20 °C to 60 °C
  • Release Temperature Range: 100 °C – 8 K
  • Thermal Rating: 30 min up to 650 °C in compliance with DIN 3586
  • Nominal Pressure: MOP 0.1 (SENTRY GS EFV)
  • Nominal Flow Rate: 6 m³/h (Natural Gas), 4.8 m³/h (Air)
  • Allowable Internal Leakage: < 30 l/h (Air) to pass through closed device.
  • Housing Material: Steel
  • Product Code: GT10… — GT 150…
  • Thread Connections: DIN EN 10226–1 / ISO 7–1
  • Flange Connections: DIN EN 1092–1:2018–12 (PN 16) / ISO 7005–1
  • Fuel Gases:: Suitable for gases according to EN 437
  • Ambient Temperature Range: — 20 °C to 80 °C (open)
  • Release Temperature Range: 100 °C – 8 K
  • Thermal Rating:
    • 30 min up to 650 °C in compliance with DIN 3586
    • Maxitrol tested up to 925 °C (in compliance with ISO 843 max 1 hour) N
  • Nominal Pressure: MOP 5 (following DIN 3586)
  • Allowable Internal Leakage: < 30 l/h (Air) to pass through closed device.
  • Housing Material: Steel
  • Complies with the new IGEM / G / 5 Ed. 3, 2022 for gas in multi-occupancy buildings (UK)
  • Pressure Equipment Directive (2014 / 68 / EU)F
  • Following DIN 3586:2003 (SENTRY GT)
  • Following DIN 30652–1 (SENTRY GS)
  • Closing factor fs: fs < 1.45 (Type K)
  • Following German DVGW-TRGI 2018 and DVFG-TRF 2021
  •  
SENTRY GT TCO and GT TCO + GS EFV – UK
SENTRY GS EFV

SENTRY GS EFV

For NEW Installations in the UK

SENTRY GS excess flow valves for residential instal­lation, shut off the gas flow when a prede­fined closing flow rate is reached. Maxitrol’s factory adjustment (100%) provides a precise and reliable closing flow rate.

  • Product Codes: GS20HH6LCZ
  • Thread Connections:
    • C – External thread in accor­dance with BS 746
    • L – Internal thread according to BS 746 3/4ʺ (with washer)
  • Fuel Gases: Suitable for gases according to EN 437
  • Ambient Temperature Range: — 20 °C to 60 °C
  • Nominal Pressure: MOP 0.1
  • Nominal Flow Rate: 6 m³/h (Natural Gas), 4.8 m³/h (Air)
  • Allowable Internal Leakage: < 30 l/h (Air) to pass through closed device.
  • Housing Material: Steel
  • Complies with the new IGEM / G / 5 Ed. 3, 2022 for gas in multi-occupancy buildings (UK)
  • Pressure Equipment Directive (2014 / 68 / EU)
  • Following DIN 30652–1 (SENTRY GS)
  • Closing factor fs: fs < 1.45 (Type K)
  • Following German DVGW-TRGI 2018 and DVFG-TRF 2021
  •  

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SENTRY GS Excess Flow Valves; SENTRY GT Thermal Cut-off Devices

Thermal cut-off devices for legacy installations & excess flow valves for the UK.

🇬🇧 UK, GSH.GT-LT-EN-02.2023-UK DownloadPreview

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