Orbinox MP Guide

MODEL
MP
ORBINOX SPAIN
Pol.Ind. s/n
-
20270 ANOETA. Tel:[phone] Fax:[phone] e
-
mail:[email protected]
ORBINOX CANADA 2050 Dagenais West, Laval, Quebec, H7L5W2 Tel:[phone] Fax:[phone] e-mail:[email protected]
ORBINOX USA 311 North Front Street, Amory, Mississippi 38821 Tel:[phone] Fax: [phone] e-mail: [email protected]
www.orbinox.com
USER MANUAL AND MAINTENANCE INSTRUCTIONS
CONTENTS
PAGE
0.-Description ................................................................................ 2
1.-Handling .................................................................................... 2
2.-Installation .................................................................................. 3
3.-Actuators .................................................................................... 5
4.-Maintenance .............................................................................. 6
4.1.-Replacement of the packing kit ...................................... .... 6
4.2.-Replacement of the seal ..................................................... 7
4.3.-Replacement of the cylinder................................................ 7
4.4.-Replacement of accesories………………... ........................ 8
4.5.-Greasing.............................................................................. 8
5.-Storage........................................................................................ 8
6.-Components list .....................................................................…. 9

. EDICIÓN 2004
MP-2/10
WWW.ORBINOX.COM
MP
MODELO
0.-DESCRIPTION
The MP model is ageneral-purpose, uni-directional flanged valve for gaseous clean fluids
such as atmospheric air, nitrogen, oxygen etc. and gaseous dirty fluids carrying suspended
solids. For the latter application the valve has a register for both the build-up of solids and
cleaning.
This is a valve which, due to its mechanical system of movement, offers several advantages
compared to other butterfly valves. These advantages include the elimination of friction
between the disc and the seat thus lengthening the valve’s service life.
This model is mainly divided into 2 types; low pressure with values equivalent to 6 Kg/cm2and
high pressure, with pressure up to 40 Kg/cm2.Likewise, as far as tightness is concerned,
these valves are mainly constructed in 2 versions. The first of these with graphite-based
braiding providing BO class 3 tightness according to standard DIN 3230 and the second
providing relative tightness with metal-metal contact.
1.-HANDLING
Pay special attention to the following points when handling an Orbinox valve:
Use the lifting lugs which all valves of this type have for moving and handling purposes:
SEE DRAWING 8260A2 (LIFTING LUGS)
-Do not lift the valve by holding it by the stem or the actuator support plate.The valve
would go totally off balance, possibly be damaged and injure the personnel handling it.
-Do not lift the valve by holding it by the bore or port. This can cause damage to the
surface of the seat, seals and the flange raised face.
SAFETY WARNING:
-Ensure that the crane, as well as the belts or slings used, are correctly set for lifting the
weight of the valve.
-These valves have support legs to prevent them from rolling while being tested or
handled.
These legs cannot be used to support the valve weight when being installed, nor can they
be used for supporting the weight of the pipes.

. EDICIÓN 2004
MP-3/10
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MP
MODELO
2.-INSTALLATION
It is important to observe the following warnings to avoid personal injuries or damage to property
when handling and installing the valve:
-Qualified and trained personnel must carry out the handling and maintenance of the
valve.
-Use suitable Individual Protection Equipment (IPE) (gloves, safety footwear...).
-Disconnect all lines affecting the valve and put up a notice notifying that work is being
carried out on the valve.
-Isolate the valve Completely from the process.
-Release process pressure.
-Drain the fluid from the valve.
Before installing the valve, inspect it to check that it has not suffered any damage during transit
or storage.
Ensure that the body inside is clean, taking special care with the seat area. Also ensure that the
neighbouring areas where the valve is to be installed are clean (flanges, pipes…).
As a uni-directional valve, it has to be installed in such a way that the PRESSURE pushes the
disc towards the SEAT. These valves have an arrow riveted in the valve body indicating the
direction of pressure. It is the user’s responsibility to correctly install and direct the valve in
relation to the direction of pressure.
It is useful to remember that the direction of flow does not necessarily coincide with the
direction of pressure: SEE DRAWING MP8260A2 (DETAIL K)
Special consideration should be given to keeping the correct distance between connection
flanges and to ensuring that they are perfectly aligned and parallel.
The incorrect positioning of counter-flanges will cause strain on the valve body which could
lead to operating problems.
The valve can be mounted in any position: horizontal, vertical or slanting, depending on the
requirements of the installation. The operating shaft MUST be mounted in a horizontal position.
In horizontal or slanting lines try to ensure that the shaft remains, not only horizontal, but also in
the upper area.
If the valve has electrical accessories such as electric-actuator, solenoid valves, limit switches,
electropneumatic positioners, etc. the corresponding earthing connections must be made
before putting it in to operation.

. EDICIÓN 2004
MP-4/10
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MP
MODELO
In big valves (Diameters of 1000 mm or larger) ensure before handling the valve that the
mechanical stop on the outside has left its seat and is positioned on the support plate.
Mechanical Stop
In order to check its operation and tightness, operate the valve with no load and then with
load. It is worth remembering that during transit / storage of the valve, the packing might have
settled thus causing a small leak. Once there is pressure inside the valve this leak could be
checked by applying soapy water to the packing gland area. This can be remedied by gently
tightening the packing gland until the aforementioned leak is eliminated.

. EDICIÓN 2004
MP-5/10
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MP
MODELO
3.-ACTUATORS
3.1.-Bevel Gear
This consists of a worm gear mechanism and the valve is shut off by making the wheel turn
towards the right. The degree of the valve opening is shown on an indicator located in the gear
casing cover.
3.2. Pneumatic
There are two possible types:
A) A double-acting rotary cylinder or with a ¼ turn whose rotating shaft directly drives the
valve stem.
B) A pneumatic double-acting linear cylinder which operates an adjustable lever fastened to
the valve stem. These cylinders are designed for working at a minimum instrument air
pressure of 4 bar. In tight valves, these cylinders are sized to open the valve at a differential
pressure equivalent to 0.1 bar and 0.3 bar in metal-metal valves. They are not intended for
operating the valve when it is submitted to line operating pressure (for example 6 bar). In
order to do so, the lever driven by the pneumatic cylinder has a regulating screw.
REGULATING SCREW IN THE LEVER (Drawing MP8260A2, section F):
This screw (32) is intended for providing the pneumatic cylinder with greater or lesser force
depending on how it’s operated. It is factory set ensuring that the cylinder with 4 bar of
instrument air pressure is able to open the valve at a differential pressure of 0.1 bar or less in
tight valves and at a pressure of 0.3 bar or less in metal-metal valves. As such, this screw
should not be adjusted unless the aforementioned set points change or the valve is
disassembled at some time in the future.
Handling the regulating screw: firstly, the locknut that fastens the screw is loosened and
secondly the abovementioned screw is moved so that by turning it anticlockwise the cylinder is
supplied with more force or, with the same result, the cylinder shaft is moved further away from
the main shaft and vice versa.
It is recommended to have a replacement cylinder of each diameter or at least to have sets of
replacement cylinder seals. Please refer to the pneumatic cylinder supplier’s maintenance
manual for changing the aforementioned seals.
3.3. Electric actuator
Specific supplier operating instructions will be enclosed in accordance with the type or make of
electric actuator delivered.

. EDICIÓN 2004
MP-6/10
WWW.ORBINOX.COM
MP
MODELO
4.-MAINTENANCE
It is important to observe the following warnings to avoid personal injuries or damage to
property when handling and installing the valve:
-Qualified and trained personnel must carry out the handling and maintenance of the valve.
-Use suitable Individual Protection Equipment (IPE) (gloves, safety footwear...).
-Disconnect all lines affecting the valve and put up a notice notifying that work is being carried
out on the valve.
-Isolate the valve Completely from the process.
-Release process pressure.
-Drain the fluid from the valve.
The MP valves do not require any maintenance other than the replacement of the packing (21)
and seals (2) in the tight valves.
The service life of these watertight elements depends on the valve’s operating conditions such
as pressure, temperature, abrasion and the number of operations.
4.1. Replacement packing kit (21) Drawing MP8260A2:
The packing kit includes 2 lines of synthetic packing made of 98% pure carbon filaments (MG-
420), at the head and bottom which are wrapped around pre-formed pure mineral graphite
rings (grafoil).
SEE DETAIL J
The circuit has to be depressurised before beginning any type of maintenance work.
1) Loosen the indication for the detectors or limit switches (46).
2) Loosen the guards on the support plate (49 and 50).
3) Take out the stud bolt (54) fastening the main lever (27) to the valve stem (7). If the nut
has a welding point remove it in order to be able to remove the stud bolt easily.
4) Loosen the bolts and nuts (53) joining the main support plate (26) to the intermediate valve
extension cover (20).
5) Due to its weight use a crane to remove the whole assembly, composed of the support
plate, cylinder and main lever.
6) Remove the packing gland (22 and 23) completely and take out the packing using a
screwdriver and / or a packing extractor.
Ensure that nothing is left behind inside the groove.
7) Position the new packing fitting the bottom line (MG-420) and all the grafoil rings without
fitting the head line. Position the packing gland (22 and 23) and tighten the
abovementioned assembly with a torque of 2 kg.m.
8) Remove the packing gland (22 and 23) and fit the head line (MG-420). Put the packing
gland back (22 and 23) and tighten until the whole assembly is tightened.
9) Position the assembly composed of the support plate, cylinder and main lever. Proceed in
reverse order from the disassembly for the assembly of the aforementioned assembly.
10) Carry out some operations with a loaded circuit and retighten the packing gland (22 and
23), only enough to prevent leaks. This check can be carried out using soapy water.

. EDICIÓN 2004
MP-7/10
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MP
MODELO
4.2. Replacement of the seal (2) (only for tight valves):
The seal with reference HECKER AK-2749 is composed of aramid fibres impregnated with
rubber on both sides and covered with a special material called centellen. This whole
assembly is completed with a graphite coating. This seal is supplied as a closed ring.
1) Remove the valve from the pipe.
2) Open the valve and hold the disc open ensuring that it doesn’t close.
3) Remove the old seal using a screwdriver and thoroughly clean the groove where the new
seal is to be positioned. This groove has a dovetail-like design.
4) Position the new seal in the groove whilst supporting it over its entire perimeter.
5) Carry out several operations since the disc, when moving, will end up homogeneously
tightening the seal in its housing.
4.3. Replacement of the cylinder: Drawing MP8260A2
The replacement of the cylinder in an MP valve can be carried out when the circuit is in
operation. The time available for carrying out the replacement has to be kept in mind for
proceeding before the next operation.
1) Shut off the air instruments valve to the pneumatic circuit.
2) Loosen the support plate (49 and 50) guards.
3) With the valve in the closed position, move screw 32 (section F) towards the outlet hole
(detail I) so that the fork pin (52) can be seen through this hole.
4) Remove the cylinder fork pin (52).
5) Dismount the pneumatic cylinder flow regulators (38).
6) See detail H (greasing boxes) and dismount covers 35 and 33 with bearing 34.
7) Move the cylinder fork towards the main valve stem and remove the cylinder from its
housing.
8) Once the cylinder is dismounted remove its fork in order to position it in the new cylinder.
When mounting the fork in the cylinder ensure that its machined part is kept towards the
inside and not the outside, see detail E.
9) For the assembly of the new cylinder work in reverse order from the disassembly.

. EDICIÓN 2004
MP-8/10
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MP
MODELO
4.4.-Replacement of accessories:
These valves are supplied with an air filter and pressure regulator. This pressure regulator is
generally set to 4 bar.
Likewise, they include one-way flow regulators with a pneumatic pipe made of high-pressure
flexible armoured rubber.
The supply includes double coil solenoid valves as well as proximity switches. It is
recommended having spare parts for all these elements. Refer to the manufacturer’s manual
for maintenance advice regarding these items.
No specific instructions are required for replacing the accessories. Generally speaking, the air
instruments valve to the pneumatic circuit is shut off before being able to change the
accessories.
4.5.-Greasing:
Since 2001, these valves have been supplied with greasing boxes in the intermediate cylinder
connection; see detail H of drawing MP8260A2.
In some valves this greasing is carried out directly in the intermediate
cylinder connection rods (See figure 1). In both cases, grease these
points every 6 months using calcic grease with the following
characteristics: insoluble in water, low ash content and excellent
adhesion.
It is recommended including greasing boxes in valves which do not
have any of these greasing systems.
5.-STORAGE
With the exception of the small sizes, these valves are individually packed.
After unloading, the valves have to be stored in a well-aired location under shelter to protect
them from dust, dirt and dampness.
If storage outside is unavoidable, keep the valve away from heat, direct sunlight or protect
from the effects of rain by using a coating. Keep well-aired to avoid dampness.

. EDICIÓN 2004
MP-9/10
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MP
MODELO
6.-COMPONENTS LIST (SEE DRAWING MP8260A2)

. EDICIÓN 2004
MP-10/10
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MP
MODELO