Introduction; Intended Use - Mankenberg EB1.12 Serie Betriebsanleitung

0 Introduction

This manual is intended to assist users of a MANKENBERG bleeding and venting valve during installa-
tion, operation and maintenance. Read the manual thoroughly before installing or putting this valve into
service.
Failure to follow the following instructions – particularly the cautionary and warning
notes – may lead to hazards and may invalidate the manufacturer's warrenty.
MANKENBERG is at your service for any assistance and queries.
See Section 11 <Further information> for the addresses.
caution
Technical information is also available at www.mankenberg.de

1 Intended use

A MANKENBERG bleeding and venting valve is a float controlled valve that, after installation, bleeds
accumulated air or other gases from high points of vessels or pipelines or ventilates the system as the
liquid level decreases, thus avoiding water shocks and underpressure.
This is an automatic function (without any additional electrical/pneumatic energy).
Depending on the liquid level, the float opens or closes a bleeding or venting valve directly or via lever
transmission.
A MANKENBERG continuous bleeding and venting valve (EB 1.10 to EB 1.48) is a device for blee-
ding gases accumulating from liquids during continuous operation.
If venting has to be avoided, a back-pressure valve can be delivered. The back-pressure valve has to
be installed in the venting pipe by the customer if not already integrated in the armature in the factory.
A MANKENBERG continuous bleeding and venting valve (EB 1.57, EB 1.59) is a device for blee-
ding gases accumulating from liquids during continuous operation. For underpressure protection,
a vacuum venting valve is integrated.
A MANKENBERG start-up bleed valve (EB 3.50, EB 3.51, EB 3.52) removes air from the system
during start-up or the filling process. Therefore valve seat and ventilation opening are proportioned lar-
ger than for continuous bleeding valves. Due to the larger seat, start-up bleeding valves vent the sys-
tem very effectively at suddenly appearing vacuum.
A MANKENBERG twin bleed valve (EB 1.74, EB 1.75, EB 1.84, EB 1.85, EB 6.54) is a combination
of continuous and start-up bleed valve and is equipped with two according valve seats.
MANKENBERG planning documents are available to give users precise assistance in selecting and de-
signing the appropriate fitting, e.g.:
In the (catalogue) section <EB: Level control valves>
<Know how bleeding and venting valves>
<Type sheet EB...> with technical data and tables of the dimensions.
These valves are no shut-off elements ensuring a tight closing of the valve. In accordance
with DIN EN 60534-4 and/or ANSI FCI 70-2 they may feature a leakage rate in closed posi-
tion in compliance with the leakage classes III or V:
Leakage class III (metal sealing cone) = 0.1 % K
note
Leakage class V (soft seal cone) = 1.8 x 10
*D=seat diameter
MANKENBERG fittings are supplied as standard for screw-mounted or flange-mounted pipeline/vessel
connections – also for special connections if required.
The upper limit of the permitted operating data for pressure and temperature is permanently
marked on each fitting supplied.
In the following sections three valve types are combined under the heading of "bleeding and
venting valves" apart from a few sections that only apply to the construction types mentioned.
value
vs
-5
x Δp x D* [l/h]
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