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Valve Proving Controls
Combustion Accessories

Valve Proving Controls TC 1-3

Valve Proving Controls TC 1 and 2The tightness control TC checks the fail-safe function of both valves before each start-up or after each shut-down of a system with two safety valves.

The TC checks for leaks in both valves of a double valve system. If it identifies an inadmissible leak in one of these gas valves, it will prevent both from opening.

It is used in industrial thermo-processing equipment, in boilers, and forced air burners.

European standards EN 746-2 and EN 676 stipulate tightness controls for capacities over 1200 kW (NFPA 86: from 117 kW or 400,000 Btu/h in conjunction with a visual indicator). Pre-purge of the combustion chamber can be dispensed with under certain conditions in accordance with EN 746-2, if a tightness control is used. In this case, the system must be vented into the open air.

TC 1

Tightness control TC 1 can be directly mounted to all CG combination controls. There is only one version for all sizes. The pre-set test period applies to all CG variants. In addition, TC 1 can be used for Valvario controls VAS, VAD and VAG (with separate adapter plate).

TC 2 and TC 410

Tightness controls TC 2 and TC 4 can be used with gas solenoid valves of any nominal size, which are quick opening or slow opening with start rate. It is possible to conduct a tightness test on pneumatically operated or slow opening valves without start rate by using additional auxiliary valves.

TC 410

Tightness control TC 4 consists of detection circuitry and can be installed in the control cabinet, separately from the system. An external pressure switch takes over the mechanical pressure test between the valves. Tightness control TC 4 is independent of gas type and inlet pressure pe and can be used for a test period of up to 10 minutes with a large test volume.

TC 3

Tightness control TC 3 is a universal device for quick and slow opening gas solenoid valves of any nominal size as well as for motorised valves. The tightness test is carried out with the valves installed in TC 3.

Features

  • Test of both safety valves
  • Short test period thanks to logical decision-making in the program sequence
  • Adjustable test period which can be adapted to different systems
  • Adjustable test mode allows quick system start
  • Maximum safety thanks to self-monitoring electronics
  • Less space required thanks to small dimensions
  • EC type-tested and certified
  • FM approved
  • TC 1-2 UL listed
Documentation for Valve Proving Control TC

Documentation

Manufacturer's Product Brochure
Manufacturer's Operating Instructions
Manufacturer's Technical Sheet
 
Ordering information for Valve Proving Control TC

Ordering Information

Model TC type Mounting Connection Pressure Price
(US List)		 Order Now
TC 116V05N 1 to Valvario valve with adapter plate 6 mm (0,24") pe max. 500 mbar (7.25 psig) $499 Buy the TC Valve Proving Control
TC 116TW05-N 1 to combination control CG 6 mm (0,24") pe max. 500 mbar (7.25 psig) $499 Buy the TC Valve Proving Control
TC 218TN05-N 2 NPT internal thread 8 mm, ¼" (0,31") pe max. 500 mbar (7.25 psig) $499 Buy the TC Valve Proving Control
TC 318TN05-N 3 NPT internal thread 8 mm, ¼" (0,31") pe max. 500 mbar (7.25 psig) $829 Buy the TC Valve Proving Control
For all other configurations Contact Combustion 911
 
Applications for Valve Proving Control TC

Applications

Click on images for close-up view.

Application for Valve Proving Controls TC TC 116V with Valvario controls

Tightness control TC 1 checks gas solenoid valves V1 and V2 for tightness.

If both valves are tight, the tightness control forwards the OK enable signal to the automatic burner control unit GFA. This opens valves V1 and V2 simultaneously. The burner starts.

V1 and V2: quick or slow opening valves with start rate.
Application for Valve Proving Controls TC TC 116W with combination control CG..D or CG..V

The tightness control is directly mounted to combination control CG..D or CG..V.

Once the tightness test has been carried out successfully, the tightness control forwards the OK enable signal to the automatic burner control unit GFA. This opens valves V1 and V2 in the combination control CG simultaneously. The burner starts.

V1 and V2: quick opening valves.
Application for Valve Proving Controls TC TC 116W with two-stage combination control CG..Z

Once the tightness test has been carried out successfully, the tightness control forwards the OK enable signal to the automatic burner control unit GFA. The pilot valve output of the automatic burner control unit GFA opens valves V1 and V2 in the combination control simultaneously. The burner starts. The main valve output opens the two-stage valve VZ, independently of TC 116W.

V1 and V2: quick opening valves.
Application for Valve Proving Controls TC TC 2 with two gas solenoid valves

Tightness control TC 2 checks gas solenoid valves V1 and V2 for tightness.

If both valves are tight, the tightness control forwards the OK enable signal to the automatic burner control unit GFA. This opens valves V1 and V2 simultaneously. The burner starts.

V1 and V2: quick or slow opening valves with start rate.

V1 and V2: quick opening valves.
Application for Valve Proving Controls TC TC 2 with two gas solenoid valves and one pilot gas valve

Tightness control TC 2 checks the gas solenoid valves for tightness. The test volume is discharged into the combustion chamber. Auxiliary valve V3 can be used as a pilot gas valve.

Once the tightness test has been carried out successfully, the tightness control forwards the OK enable signal to the automatic burner control unit GFA. The pilot valve output of the automatic burner control unit GFA opens the gas solenoid valves V1 and V3 simultaneously. The main valve output opens gas solenoid valve V2. The burner starts.

V1 and V2: quick or slow opening valves with start rate.
V3: quick opening, minimum nominal size = DN 15.
Application for Valve Proving Controls TC TC 2 with two gas solenoid valves and one auxiliary valve for discharge

Tightness control TC 2 checks the gas solenoid valves V1 and V2 and the auxiliary valve V3 for tightness.

If all the gas solenoid valves are tight, the tightness control forwards the OK enable signal to the automatic burner control unit GFA. The pilot valve output of the automatic burner control unit GFA opens the gas solenoid valves V1 and V2 simultaneously. The burner starts.

A relief line is used to discharge the test volume into the open air via the roof. Thanks to the installed auxiliary valve V3, valve V2 can also be a slow opening motorised valve VK.

V1: quick or slow opening valves with start rate
V2: any
V3: quick opening, minimum nominal size = DN 15.
Application for Valve Proving Controls TC TC 2 with 3 valves installed in series

Tightness control TC 2 checks the central shut-off valve V1, the gas solenoid valve V2 and the auxiliary valves V3 and V4 for tightness. The test volume is supplied via the auxiliary valve V3. The central shut-off valve V1 can thus also be a slow opening motorised valve VK. The test volume is discharged via auxiliary valve V4 and the relief line.

It must be ensured that the test volume can be supplied and discharged during the opening time of the gas solenoid valves. Therefore, the pressure switch DG monitors the pressure downstream of the gas solenoid valve V2 and switches when the set pressure is exceeded. Then the gas solenoid valve VAS opens and the pipe downstream of V2 is vented.

Once the tightness test has been carried out successfully, the tightness control TC 2 opens the shut-off valve V1 and gas solenoid valve V2. The tightness control forwards the OK enable signal simultaneously to the automatic burner control units. These open the burner valves and the burners start.

V3 and V4: quick opening, minimum nominal size = DN 15.
Application for Valve Proving Controls TC TC 3 with two gas solenoid valves

Tightness control TC 3 checks the slow opening gas solenoid valves or motorised valves VK for tightness using the auxiliary valves installed in TC 3.

Once the tightness test has been carried out successfully, the tightness control forwards the OK enable signal to the automatic burner control unit GFA. The pilot valve output of the automatic burner control unit GFA opens the gas solenoid valves V1 and V2 simultaneously. The burner starts.

V1 and V2: any.
Application for Valve Proving Controls TC TC 3 with a manually resettable valve

Valves, which are manually reset, cannot be opened by the tightness control. The tightness test is then carried out using an additional auxiliary valve.

Tightness control TC 3 checks the tightness between the manually resettable valve V1 and gas solenoid valve V2 using the auxiliary valves installed in TC 3.

Once the tightness test has been carried out successfully, TC 3 forwards the OK enable signal.
Application for Valve Proving Controls TC TC 3 in a multiple burner system

Tightness control TC 3 checks the central shut-off valve V1 and gas solenoid valve V2 for tightness. Both valves can also be motorised valves VK.

It must be ensured that the test volume can be supplied and discharged during the opening time of the gas solenoid valves. Therefore, the pressure switch DG monitors the pressure downstream of the gas solenoid valve V2 and switches when the set pressure is exceeded. Then the gas solenoid valve VAS opens and the pipe downstream of V2 is vented.

Once the tightness test has been carried out successfully, TC 3 opens the shut-off valve V1 and gas solenoid valve V2 and forwards the OK enable signal to the automatic burner control units. These open the burner valves and the burners start.
 
Specifications for Valve Proving Control TC

Specifications

General Specifications
Mains voltage: 110/120 V AC, -15/+10 %, 50/60 Hz
220/240 V AC, -15/+10 %, 50/60 Hz
24 V DC, ± 20%
Power consumption: 10 VA for 110/120 V AC and 220/240 V AC, 1.2 W for 24 V DC.
Ambient temperature: -15 to +60°C (+5 to +140°F), no condensation permitted.
2.5 mm2 screw terminals.
Fusing: fine-wire fuse 5 A, slow-acting, H pursuant to IEC 127, also protects the valve outputs and external operating signal.
External operating signal: with mains voltage, max. 5 A resistive load (UL approved: 5 A for 120 V), max. 2 A for cos φ = 0.35 (pilot duty).
External fault signal: fault signalling contact, max. 5 A for 264 V
Reset: using a button on the device
Remote reset: by applying mains voltage
Housing: impact-resistant plastic
Gas Type: For natural gas, town gas and LPG (gaseous), also for biologically produced methane.
Inlet pressure pe: 10 to 500 mbar (3.9 to 195 “WC)
Test period tP: 10 to 60 s, adjustable: set at the factory to 10 s
TC 3: Power consumption of the installed valves during the opening time tL: max. 9,5 VA (W)
Enclosure: IP 54
Connection: Standard coupler plug to DIN 43650/ ISO 4400
Maintenance cycles: The tightness control requires little servicing. We recommend a function check once a year.

Valve Proving Control TC 3
Valve-proving Control TC-3