Operating manual - Rifox-Hans Richter GmbH

Model 8551 and 8551-N vent valve, PN 160, DN 15-50
1.0 Safety instructions
1.1 Proper use
Any improper use, intervention in the design and deviation from the design data automatically lead to
termination of the warranty. The vent valve is designed for the discharge of air from liquid systems. Any
other use is not permissible. The manufacturer is not liable for damage resulting from any other use.
The user or operator bears the risk in this case. This also applies analogously to incorrect assembly,
start up, use and maintenance.
1.2 Warnings and symbols
■ Personal risk due to escaping operating medium as well as because of pressure, temperature and
weight. Failure to comply with these warnings results in the risk of accidents.
■Follow the instructions in this operating manual.
■The operator must ensure that this operating manual and, if necessary, other relevant documents are
available on site.
■Only trained or instructed personnel may be employed here.
■Any mode of operation that may impair safety must be avoided.
2.0 General description and use
2.1 Design of the vent valve
Item 1 Housing cover
2 Housing gasket
3 Housing with connections
4 Control screw
5 Set of screws with nuts
6 Drain plug
7 Float control
8 Supporting structure with rotary slide valve
9 Float with fork
10 Supporting screw
11 Seal for Supporting screw
12 Seal for drain plug
13 Seal for control screw
Rev. 03/2012-Di Page 1 of 5 Subject to modification !

2.2 Design of the automatic venting unit
2.3 Function-limit of control units
2.4 Performance
2.5 Function / installation
The float control assembly discharges air and gases from all liquid carrying systems without time lag,
independent of pressure and temperature variations. With the float in the lower position the outlet crosssection
is open. Air and gases escape through the upturned immersion tube. Rising of the liquid level
lifts the float and causes to close the outlet.
� Remove protective caps from inlet and outlet.
� Fitting position according to figure (page 1)
� Flow direction according to the arrow provided on the rating plate
� Support: The weight of the condensate trap must be taken up by a holding device and
support. The condensate trap weight approx. 40-50 kg.
Rev. 03/2012-Di Page 2 of 5 Subject to modification !

Rev. 03/2012--Di
TTo
avoid dowwn
times, it iss
recommended
that prov vision be maade
for a shuut-off
device with w a by-passs
line
bboth
in front of and behinnd
the condeensate
trap
3.0 SStart
up
TThe
pressuree
build-up annd
heating-up
of the hous sing should nnot
take placce
abruptly. If f leaks occurr
due
tto
so-called ssettling
afterr
the first starrtup,
the scre ews (items 4,
5, 6,10) cann
be retighte ened taking innto
aaccount
the indicated torrque.
Retighttening
may only o be carrieed
out when the housing is depressuurized
aand
at most warm to thee
touch.
4.0
Maintenance
/ inspecction
4.1 OOpening
thee
automatic venting uniit
and disma antling the ffloat
controll
� The ventinng
unit must be depressuurized.
Shut off o the systemm
securely inn
front of and d behind the
aautomatic
venting
unit.
� Release aany
remaininng
pressure in
the housin ng by loosening
screw (4) ) or (6) by on nly a quarter turn.
TThe
weight oof
the automaatic
venting unit
must be ta aken up by a support, e.gg.
and must be taken outt
of
tthe
pipeline ssystem.
� Loosen housing
bolts (5) evenly crosswise.
Pu ull down loweer
housing seection
(3).
4.2 DDismantlingg
the float coontrol
� Loosen suupport
bolt (110)
and screew
out 1 to 2 turns.
��
Tap gentlyy
on the frontt
end of the ssupport
bolt (10) ( with a plastic
mallet. .
��
This looseens
the controol
from the cconical
housing
seat.
� Screw out
support bolt
(10) with seeal
(11) com mpletely.
Remove ffloat
control.
4.3 DDisassembling
and cleaaning
the flooat
control
1. After remooving
the cottter
pin (k), thhe
rotary valv ve (i) is simpply
pulled outt
to the sidee.
22.
Clean the parts using, for examplee,
benzine.
33.
Check thee
rotary valvee
(i) for wear along the se ealing edge. If wear is
detected, the
support boody
(8) togetther
with the rotary valve (i) must be rreplaced.
A careful lleak
test muust
be carriedd
out by RIFO OX.
44.
During asssembly
ensuure
that the nnotch
in the rotary r valve ( (i) points to thhe
punch ma ark
on the suppport
body (88)
and the cootter
pin (k) is s inserted annd
secured again
carefully.
55.
It must bee
possible to move the flooat
up and do own easily byy
hand.
4.4 IInstalling
thhe
float conttrol
� The compplete
float conntrol
is insertted
into the conical c housing
seat with the support body (10). Itt
must
bbe
ensured hhere
that the float is posittioned
in the center of thee
housing (1).
� Screw in ssupport
bolt ( (10) with gassket
(11) and d tighten withh
a standard ring wrench. Tightening ttorque
aaccording
to the section 4.7.
4.5 AAssemblingg
the ventingg
automat
� Check thee
housing gassket
(2) and replace nece essary.
� Mount the lower housing
part (3) wwith
upper ho ousing part (11)
� Tighten the
housing boolts
(5) evenly
crosswise.
Tightening torque according
to the section s 4.7.
Page 3 of 5
puncch
mark
notcch
Subject to modificaation
!

4.6 Care and maintenance, spare parts
� In the case of a great risk of dirt accumulation, the housing should be rinsed thoroughly from time to
time, but while depressurized. If necessary, the float control should also be checked according to
section 4.3.
Spare parts: Only genuine spare parts may be used.
Version 1.4571
4.7 Screw tightening torque (at room temperature, coat thread with
temperature-resistant lubricant)
Position Tightening torque
4 20 Nm
5 70 Nm
6 30 Nm
10 25 Nm
Rev. 03/2012-Di Page 4 of 5 Subject to modification !

5 Conformity assessment
We declare conformity with Directive 97/23/EC of 29.05.97 for the following pressure equipment:
Automatic venting unit, type:
■ 8551, P265GH, DN 15-50: Fluid group 1, Category III, Module H
■ 8551, 13CrMo4-5, DN 15-50: Fluid group 2, Category II, Module H
■ 8551, 10CrMo9-10, DN 15-50: Fluid group 2, Category II, Module H
■ 8551-N, 1.4571, DN 15-50: Fluid group 1, Category III, Module H
The pressure equipment described is a pressure-keeping component in accordance with Article 1,
2.1.4. Applied conformity assessment procedure according to Annex III:
Designated office: Lloyd’s Register Quality Assurance GmbH, Am Sandtorkia 4, D-20457 Hamburg,
Germany. Identification No. 0525
In the case that the equipment is modified without our approval, this declaration shall no longer be valid.
RIFOX-Hans Richter GmbH
Spezialarmaturen
Rev. 03/2012-Di Page 5 of 5 Subject to modification !