Our heaters are thermodynamically and

structurally optimized and are characteri-

zed by high effi ciency, excellent heat trans-

fer and low fi lm temperatures. In the design,

for example, attention was paid to suffi cient

possibilities for thermal expansion of the coil.

The heaters are available in two different series:

horizontal (WEH) and vertical (WEV).

The design was developed for a particularly ba-

lanced temperature profi le to avoid temperature

peaks. Only high-quality refractory materials are

used so that an emergency power supply is not

necessary.

Built-in components are user-friendly and meet

all required safety standards.

• High effi ciency

• Low fi lm temperature

• Flexible installation options

• Highest safety standards

NESS Wärmetechnik GmbH / Remsstraße 24 / 73630 Remshalden - GermanyTel. +49 (7181) 9675 1 / Fax +49 (7181) 42612 / info@ness.de / ness.de

Your advantages at a glance

NESS Thermal oil heater (WEH / WEV)

Installed, gas-fi red heater (Type WEH) with combus-tion air pre-heater (Luvo)

Fired heaters for gaseous and liquid fuels

Function 3-pass heater: Optimal heat distribution

#13-pass principle for an optimal temperature profi le without temperature peaks

#2 High effi ciency through optimal coil design

NESS Wärmetechnik GmbH / Remsstraße 24 / 73630 Remshalden - GermanyTel. +49 (7181) 9675 1 / Fax +49 (7181) 42612 / info@ness.de / ness.de

Horizontal or vertical? The optimal design as needed

NESS_WEH_WEV_V01_01_ENAll information is without obligation

High effi ciency and balanced temperature profi le

Thermal oil is evenly heated using

a 3-pass system. This prevents

temperature peaks on the coil,

which would lead to an exces-

sive fi lm temperature of the oil.

Thermal oil outlet

1. Pass

2. Pass

3. Pass

Inner tube

Outer tube

flue gas outlet

Burner

Thermal oil inlet

flue gas

Flame

An optimal coil design increases

effi ciency and plant safety.

The two types of construction (WEH and WEV)

do not differ in their mode of operation.

In most cases, the local conditions and any exis-

ting facilities are the decisive factor for one of

the two solutions.

Type WEV is usually suitable if there is little fl oor

space available or if the fuel used does not burn

residue-free, as cleaning openings can be provi-

ded on its bottom.

Type WEH makes the burner particularly easy

to access for maintenance work. It is especially

practical in combination with a combustion air

preheater (Luvo), as it can be mounted directly

on the heater. However, the use of a combustion

air pre-heater is also possible in conjunction with

a WEV.

Thermal oil plant with vertical heater (Type WEV) and adjoining combustion air pre-heater (Luvo)