IM No.: IM/V/0015, Rev. 7
Date: 14.10.2019
Page 5 of 6
SPARE ORDERING CODE
RECOMMENDED MAINTENANCE
PREVENTIVE
Replacement of Complete Set of O Ring
…
…
Once in 5 years or 2 million operations.
- Guide O Ring, MA O Ring,
- Body O Ring, Seat O Ring,
- Plunger O ring, Sleeve O ring
Replacement of Plunger Assembly
…
…
…
Once in 5 years or 2 million operations
Replacement of the Solenoid
…
…
…
As and when required.
Check of Insulation Resistance, Resistance of the Solenoid
… Once in a year (should be > 100M Ohms @
500V DC.
Check Resistance of the Solenoid
…
…
…
Replace Solenoid if the resistance reduces
more than 5% computed at 20ºC as compared
to its Initial value.
MAINTENANCE
– GENERAL INSTRUCTION
The Solenoid Valve must be removed from the site and has to be maintained under safe conditions.
All air and electrical connections must be switched off before removing valve from the line.
It is recommended to replace complete set of O Ring even if one of the O Ring is damaged. This is to ensure
trouble free operation of the valve and will avoid its premature failure.
Using Grease other than Silicon base Molykote M55 will lead to premature failure of O Rings of the
ROTEX
Solenoid valve.
If necessary to clean the components,
do not use Kerosene, Diesel, Petrol to clean valve as this
damages the O Rings and other rubber material. Instead use light Detergent Soap Solution.
Ensure that the components are free from dust, dirt, lint and metal burrs.
Twisting of O Ring should be avoided. Ensure that the twist is removed before fitting matching part.
While closing the matching part, the matching part should be pushed in a straight line. Turning motion should
be avoided.
Pinching of O Ring at the groove corner at the time of closing gland should be avoided.
User is requested to use safe practice for maintenance.
It is important to place the dismantled Valve Parts on a clean paper or cloth in same sequence in which you
have dismantled them.
Ensure to keep all the components of the valve separately to avoid their mixing up. The component appears
tobe same may have small differences which will cause malfunction if interchanged.
In case of difficulty you should contact the Agent, Distributor or
ROTEX
directly.
Using
ROTEX
genuine spares will
Guarantee
you trouble free operation and will avoid premature failure.
(A)
TO REPLACE SOLENOID
1)
Open dome nut and pull out solenoid.
2)
Replace new solenoid ensuring the construction, voltage and current meets the requirements.
3)
Tighten the dome nut applying torque of 0.2 kgm to 0.35 kgm to avoid over tightening of the
solenoid.
4)
Measure and record resistance of the Solenoid.
(B)
TO REPLACE GUIDE ASSEMBLY (CORE TUBE) / PLUNGER,
SET OF „O‟ RING
1)
Open dome nut and pull out solenoid.
2)
Open Guide Assembly (Core Tube) using guide opening tool / spanner.
3)
Pull out Plunger Assembly along with Sleeve.
4)
Insert a small pin in the hole of magnet holder and second pin in the Plunger.
5)
Open the same by rotating anti clockwise. Remove old „O‟ Rings and clean metallic parts.
6)
Replace all the „O‟ Rings like Plunger O Ring, Seat O Ring and reassemble magnet holder
into the Plunger using small amount of Locktite 242 on the thread of magnet holder.
7)
Reassemble Sleeve along with Sleeve O Ring and insert assembly in the body.
8)
Fix the Guide Assembly ensuring that Guide O Ring and Sleeve O Ring are well placed.
9)
Check the valve for operation and leakage.
