Load valve

VTC300

Accurate control of the return water temperature.
Easy installation. No need of adjustment valve.
Easy but normally not required maintenance.

The series VTC300 is a compact and accurate load valve used for solid fuel boilers up to 30 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

VTC311, Internal thread

Art.no.	Reference	DN	Kvs	Opening temperature	Connection	A [mm]	B [mm]	C [mm]	D [mm]	Weight [kg]
51000100	VTC311	20	3,2	45 ± 2°C	Rp ¾"	70	42	42	46	0,53
51000200	VTC311	20	3,2	55 ± 2°C	Rp ¾"	70	42	42	46	0,53
51000300	VTC311	20	3,2	60 ± 2°C	Rp ¾"	70	42	42	46	0,53

VTC312, External thread

Art.no.	Reference	DN	Kvs	Opening temperature	Connection	A [mm]	B [mm]	C [mm]	D [mm]	Weight [kg]
51000800	VTC312	15	2,8	45 ± 2°C	G ¾"	70	42	42	46	0,48
51000900	VTC312	15	2,8	55 ± 2°C	G ¾"	70	42	42	46	0,48
51001000	VTC312	15	2,8	60 ± 2°C	G ¾"	70	42	42	46	0,48
51001500	VTC312	20	3,2	45 ± 2°C	G 1"	70	42	42	46	0,51
51001600	VTC312	20	3,2	55 ± 2°C	G 1"	70	42	42	46	0,51
51001700	VTC312	20	3,2	60 ± 2°C	G 1"	70	42	42	46	0,51

VTC317, Pump flange and external thread

Art.no.	Reference	DN	Kvs	Opening temperature	Connection	A [mm]	B [mm]	C [mm]	D [mm]	Weight [kg]
51002200	VTC317	20	3,2	45 ± 2°C	PF 1½", G 1"	75	42	42	57	0,57
51002300	VTC317	20	3,2	55 ± 2°C	PF 1½", G 1"	75	42	42	57	0,57
51002400	VTC317	20	3,2	60 ± 2°C	PF 1½", G 1"	75	42	42	57	0,57

VTC318, Rotating nut and external thread

Art.no.	Reference	DN	Kvs	Opening temperature	Connection	A [mm]	B [mm]	C [mm]	D [mm]	Weight [kg]
51002900	VTC318	20	3,2	45 ± 2°C	RN 1", G 1"	70	42	42	46	0,49
51003000	VTC318	20	3,2	55 ± 2°C	RN 1", G 1"	70	42	42	46	0,49
51003100	VTC318	20	3,2	60 ± 2°C	RN 1", G 1"	70	42	42	46	0,49

Installation support

Replace thermostat in VTC300

Installation examples

Documents

Name	Download
Installation instruction VTC300

Technical data

Pressure class:	PN10
Differential pressure, max.:	Mixing: 100 kPa; Diverting: 30 kPa
Leakrate A - AB:	Tight sealing
Leakrate B - AB:	max. 3% of Kvs
Rangeability Kv/Kv min:	100
Media, Heating water:	in accordance with VDI2035
Media, Water/Glycol mixtures:	max. 50 %
Media, Water/Ethanol mixtures:	max. 28 %
Media temperature, max.:	+100 °C
Media temperature, min.:	0 °C
Connections, Internal thread (G):	EN 10226-1
Connections, External thread (G):	ISO 228/1
Material, Valve housing and other metal parts with fluid contact:	Brass DZR, CW 625N (resistant to dezincification)

Conformity

PED 2014/68/EU, article 4.3 /
SI 2016 No. 1105 (UK)

Flow pattern

Dimensioning

Please see data sheet

Accessories and spare parts

Options

Art No.	Reference	Designation	Note
57000100	VTC931	ESBE VTC931 Thermostat 45°C
57000200	VTC931	ESBE VTC931 Thermostat 55°C
57000300	VTC931	ESBE VTC931 Thermostat 60°C	Load valve VTC317
57000400	VTC931	ESBE VTC931 Thermostat 70°C
57000500	VTC931	ESBE VTC931 Thermostat 80°C

Spare parts

	Art No.	Reference	Designation	Note
	57000600	VTC931	ESBE VTC931 Thermostat, 42°C

Download area

Data Sheet Data Sheet (Old) Installation instruction Certificate Image 2D Image

Type	Preview	Download
Data Sheet	VTC300
Installation instruction	VTC300
Certificate	Declaration of Conformity, VTC300
Certificate	Declaration of Conformity UKCA, VTC300
Certificate	Building Product Declaration BPD3, VTC300
Certificate	EAC certificate (RU), VTC300
Certificate	Certificate of conformity UA, VTC300
Image	VTC311, high res
Image	VTC312, high res
Image	VTC317, high res
Image	VTC318, high res
2D Image	VTC310
2D Image	VTC317