Load valve

VTC500

  • Accurate control of the return water temperature.
  • Easy installation. No need of adjustment valve.
  • The series VTC530 includes shut off valves and insulation. Just add the best suitable pump.
  • Easy but normally not required maintenance.
The series VTC500 is a thermic valve used for solid fuel boilers up to 150 kW. The load valve makes sure that the boiler gets up to a high combustion temperature so as to ensure the lowest possible emissions. Above all, the valves make sure that the return temperature to the boiler is kept high and guaranteed over the entire combustion cycle which enables a higher level of boiler efficiency, reduced tarring and increased life span of the boiler.
Product range

VTC511, Internal thread

Art.no. Reference DN Kvs Opening temperature Connection A [mm] B [mm] C [mm] D [mm] Weight [kg] Replaces
51020100 VTC511 25 9 50°C ± 5°C Rp 1" 93 34 69 47 0,84 11400600
51020200 VTC511 25 9 55°C ± 5°C Rp 1" 93 34 69 47 0,84 11400700
51020300 VTC511 25 9 60°C ± 5°C Rp 1" 93 34 69 47 0,84 11400400
51021100 VTC511 25 9 65°C ± 5°C Rp 1" 93 34 69 47 0,84
51020400 VTC511 25 9 70°C ± 5°C Rp 1" 93 34 69 47 0,84 11400100
51020600 VTC511 32 14 50°C ± 4°C Rp 1¼“ 105 38 75 55 1,4 11401100
51020700 VTC511 32 14 55°C ± 4°C Rp 1¼“ 105 38 75 55 1,4 11401200
51020800 VTC511 32 14 60°C ± 4°C Rp 1¼“ 105 38 75 55 1,4 11400800
51021200 VTC511 32 14 65°C ± 4°C Rp 1¼“ 105 38 75 55 1,4
51020900 VTC511 32 14 70°C ± 4°C Rp 1¼“ 105 38 75 55 1,4 11400200

VTC512, External thread

Art.no. Reference DN Kvs Opening temperature Connection A [mm] B [mm] C [mm] D [mm] Weight [kg]
51021500 VTC512 25 9 50°C ± 5°C G 1¼" 93 34 69 47 0,80
51021600 VTC512 25 9 55°C ± 5°C G 1¼“ 93 34 69 47 0,80
51021700 VTC512 25 9 60°C ± 5°C G 1¼“ 93 34 69 47 0,80
51022500 VTC512 25 9 65°C ± 5°C G 1¼“ 93 34 69 47 0,80
51021800 VTC512 25 9 70°C ± 5°C G 1¼“ 93 34 69 47 0,80
51022000 VTC512 32 14 50°C ± 4°C G 1½" 105 38 75 55 1,3
51022100 VTC512 32 14 55°C ± 4°C G 1½" 105 38 75 55 1,3
51022200 VTC512 32 14 60°C ± 4°C G 1½" 105 38 75 55 1,3
51022600 VTC512 32 14 65°C ± 4°C G 1½" 105 38 75 55 1,3
51022300 VTC512 32 14 70°C ± 4°C G 1½" 105 38 75 55 1,3

VTC531, Internal thread

Art.no. Reference DN Kvs Opening temperature Connection A [mm] B [mm] C [mm] D [mm] Weight [kg] Replaces
51025500 VTC531 25 8 50°C ± 4°C G 1" 197 77 121 110 2,0
51025600 VTC531 25 8 55°C ± 4°C G 1" 197 77 121 110 2,0
51025700 VTC531 25 8 60°C ± 4°C G 1" 197 77 121 110 2,0
51027500 VTC531 25 8 65°C ± 4°C G 1" 197 77 121 110 2,0
51025800 VTC531 25 8 70°C ± 4°C G 1" 197 77 121 110 2,0
51026000 VTC531 32 8 50°C ± 4°C G 1¼“ 230 77 138 110 2,2
51026100 VTC531 32 8 55°C ± 4°C G 1¼“ 230 77 138 110 2,2
51026200 VTC531 32 8 60°C ± 4°C G 1¼“ 230 77 138 110 2,2
51027600 VTC531 32 8 65°C ± 4°C G 1¼“ 230 77 138 110 2,2
51026300 VTC531 32 8 70°C ± 4°C G 1¼“ 230 77 138 110 2,2
51026500 VTC531 40 8 50°C ± 4°C G 1½" 242 77 143 110 2,3
51026600 VTC531 40 8 55°C ± 4°C G 1½" 242 77 143 110 2,3
51026700 VTC531 40 8 60°C ± 4°C G 1½" 242 77 143 110 2,3
51027700 VTC531 40 8 65°C ± 4°C G 1½" 242 77 143 110 2,3
51026800 VTC531 40 8 70°C ± 4°C G 1½" 242 77 143 110 2,3 11400300
51027000 VTC531 50 12 50°C ± 4°C G 2" 260 77 152 110 2,6
51027100 VTC531 50 12 55°C ± 4°C G 2" 260 77 152 110 2,6
51027200 VTC531 50 12 60°C ± 4°C G 2" 260 77 152 110 2,6
51027800 VTC531 50 12 65°C ± 4°C G 2" 260 77 152 110 2,6
51027300 VTC531 50 12 70°C ± 4°C G 2" 260 77 152 110 2,6
Installation support

Replace thermostat in VTC500

Installation examples

Installation examples
Mixing
Diverting

Documents

Technical data

Technical data

Pressure class: VTC510: PN 10;
VTC530: PN 6
Differential pressure, max.: 100 kPa
Differential pressure A - B, max.: 30 kPa
Leakrate A - AB: max. 1% of Kvs
Leakrate B - AB: max. 3% of Kvs
Rangeability Kv/Kv min: 100
Conformity:

PED 2014/68/EU, article 4.3

Pressure Equipment in conformity with PED 2014/68/EU, article 4.3 (sound engineering practice). According to the directive the equipment shall not carry any CE-mark.

Media temperature, max.: +110 °C
Media temperature, min.: 0 °C
Connections, Internal thread (G): ISO 228/1
Connections, Internal thread (Rp): EN 10226-1
Connections, External thread (G): ISO 228/1
Material, Valve body and cover: Nodular iron, EN-JS 1050

Flow pattern

Flow pattern
Mixing
Diverting

Dimensioning

Dimensioning
Please see data sheet
Accessories and Spare Parts

Options

Art No. Reference Designation Description
57060500 57060500 LTC801 ESBE LTC801 Shut-off valves / Adapters G1½" x G1", 3pcs. ESBE LTC801 Shut-off valves / Adapters G1½" x G1" 3pcs.
57060600 57060600 LTC801 ESBE LTC801 Shut-off valves / Adapters G1½" x G1¼", 3pcs. ESBE LTC801 Shut-off valves / Adapters G1½" x G1¼" 3pcs.
57060700 57060700 LTC801 ESBE LTC801 Shut-off valves / Adapters G1½" x G1½", 3pcs. ESBE LTC801 Shut-off valves / Adapters G1½" x G1½" 3pcs.
57060800 57060800 LTC801 ESBE LTC801 Shut-off valves / Adapters G1½" x G2", 3pcs. ESBE LTC801 Shut-off valves / Adapters G1½" x G2" 3pcs.
57060900 57060900 LTC801 ESBE LTC801 Shut-off valves / Adapters 1½" x CPF 28mm, 3pcs. ESBE LTC801 Shut-off valves / Adapters 1½" x CPF 28mm 3pcs.
57020100 57020100 VTC951 ESBE VTC951 Thermostat 50°C ESBE VTC951 Thermostat 50°C
57020200 57020200 VTC951 ESBE VTC951 Thermostat 55°C ESBE VTC951 Thermostat 55°C
57020300 57020300 VTC951 ESBE VTC951 Thermostat 60°C ESBE VTC951 Thermostat 60°C
57020800 57020800 VTC951 ESBE VTC951 Thermostat 65°C ESBE VTC951 Thermostat 65°C
57020400 57020400 VTC951 ESBE VTC951 Thermostat 70°C ESBE VTC951 Thermostat 70°C
57020600 57020600 VTC952 ESBE VTC952 Thermometer, 3pcs Thermometer VTC952, 3pcs.
57020700 57020700 VTC953 ESBE VTC953 Insulation, ≥ DN32 Insulation VTC953, ≥ DN32.

Spare parts

Art No. Reference Designation Description
57020500 57020500 VTC951 ESBE VTC951 Thermostat 75°C ESBE VTC951 Thermostat 75°C
57020900 57020900 LTC922 ESBE LTC922 Jointing set VTC/LTC, 3pcs of fibre gasket 1½". ESBE LTC922 Jointing set VTC/LTC, 3pcs of fibre gasket 1½".
Download area

Download area

Type Preview Download
Data Sheet VTC500 download
Installation instruction VTC500 download
Certificate Declaration of Conformity VTC500 download
Certificate Building Product Declaration BPD3 download
Image VTC511, high res download
Image VTC512, high res download
Image VTC531, high res download
2D Image VTC510 download
2D Image VTC530 download
Applications

Applications

Solid fuel system with additional boiler.

Complete solid fuel application with domestic hot water and solar system.

Efficient storage tank loading with circulation pump of own choise.

Solid fuel application with back-up heat soruce.