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laurahallSep 12, 2025
What causes a GEM Control Unit valve body to leak?
- RRoberta FisherSep 12, 2025
If the GEM Control Unit valve body is leaking, inspect it for any signs of damage or corrosion. If damage is found, replace the valve body.
What causes a GEM Control Unit valve body to leak?
If the GEM Control Unit valve body is leaking, inspect it for any signs of damage or corrosion. If damage is found, replace the valve body.
What to do if GEM 550 Control Unit does not open fully?
If your GEM Control Unit isn't opening fully, there are several potential causes. It could be due to low control pressure (operate the product with the control pressure specified in the datasheet), a disconnected control medium (connect control medium), a leaking control piston or spindle seal (replace the actuator and check the control medium for impurities), or a faulty actuator spring (replace the actuator).
How to fix GEM Control Unit leaking between actuator and valve body?
If your GEM Control Unit is leaking between the actuator and valve body, the issue could be a loose union nut (retighten the union nut), a faulty sealing washer (check the sealing washer and respective sealing surfaces for damage and replace parts if necessary), or damage to the actuator/valve body (replace the actuator/valve body).
What causes GEM Control Unit valve body to leak?
A GEM Control Unit valve body may leak if the valve body is damaged or corroded. To resolve this, check the valve body for damage and replace it if necessary.
What to do if GEM 550 Control Unit connection between valve body and piping is leaking?
If the connection between the valve body and piping is leaking on your GEM Control Unit, it could be due to incorrect installation (check the installation of the valve body in the piping), loose threaded connections or unions (tighten the threaded connections or unions), or faulty sealing material (replace the sealing material).
What causes control medium escaping from leak detection hole in GEM Control Unit?
The control medium might be escaping from the leak detection hole in your GEM Control Unit due to a leaking spindle seal. To fix this, replace the actuator and check the control medium for impurities.
What to do if control medium escapes from vent hole in GEM Control Unit?
If control medium is escaping from the vent hole in the actuator cover (for control function NO) or connector 2 (for control function NC) of your GEM Control Unit, the control piston is likely leaky. The suggested solution is to replace the actuator and check the control medium for impurities.
What to do if control medium escapes from leak detection hole in GEM Control Unit?
If control medium escapes from the leak detection hole in your GEM Control Unit, it indicates that the spindle seal is leaking. The suggested solution is to replace the actuator and check the control medium for impurities.
Why is my GEM Control Unit valve leaking between the actuator and valve body?
If the GEM Control Unit valve is leaking between the actuator and valve body, start by checking if the union nut is loose and retighten it. If the leak persists, inspect the gasket and respective sealing surfaces for damage, replacing parts if necessary. In some cases, the valve body or actuator itself may be damaged, requiring replacement.
What to do if GEM Control Unit valve leaks downstream?
If your GEM Control Unit valve leaks downstream, several issues could be the cause. First, ensure the operating pressure aligns with the data sheet specifications. Excessive pressure can cause leaks. Secondly, inspect for any foreign matter between the seat seal and seat. Disassemble the actuator to remove any debris and check the seat seal for damage, replacing it if necessary. The valve body itself could be leaky or damaged, requiring inspection and potential replacement. A faulty seat seal can also cause leaks, so check it for damage and replace if needed. Lastly, for control function NC, a faulty actuator spring may be the reason; in this case, replace the actuator.
General| Brand | GEM |
|---|---|
| Model | 550 |
| Category | Control Unit |
| Language | English |
Explains document scope, symbols, definitions, and warning note system.
Details symbols used and defines terms like working medium and control function.
General safety information for installation, operation, and maintenance.
Details the components and materials of the GEMÜ 550 valve.
Explains how the product controls flowing medium and its control functions.
Illustrates flow direction and describes the actuator vent hole.
Explains product label data and CONEXO system benefits for traceability and service.
Details correct usage, including explosion protection and general guidelines.
Provides an overview of standard configurations and order codes for the GEMÜ 550.
Lists design types, special versions, and CONEXO options.
Specifies working/control media, viscosity, and temperature ranges.
Presents operating pressure data for Control Function 1 (NC) under the seat.
Shows operating pressure for Control Function 1 (NC) over the seat.
Graphs relating control pressure to operating pressure for NC function.
Graphs relating control pressure to operating pressure for NC function.
Shows filling volume, piston diameter, and leakage rate.
Details maximum allowable operating pressures at various temperatures.
Table of Kv values and lists regulations for Food, PED, and Machinery Directives.
Specifies gas standards and ATEX availability for explosion protection.
Tables showing actuator and body weights based on DN and connection type.
Diagrams and table showing actuator dimensions (ØB, M, H max, G, A2).
Details installation dimensions for 2/2-way bodies with different actuator sizes.
Shows installation dimensions for angle valve bodies with different actuator sizes.
Lists body dimensions for spigot DIN/EN/ISO/ASME (actuator size 0).
Body dimensions for spigot DIN/EN/ISO/ASME (actuator sizes 1-5).
Body dimensions for spigot EN/ISO (actuator sizes 1-5).
Body dimensions for spigot EN/ISO/ASME (actuator sizes 1-5).
Body dimensions for threaded socket DIN/NPT (actuator size 0).
Body dimensions for threaded socket DIN/Rc/NPT (actuator sizes 1-5).
Body dimensions for threaded socket DIN/NPT (actuator sizes 1-5).
Body dimensions for threaded spigot DIN (code 9) for actuator size 0.
Body dimensions for threaded spigot DIN (code 9) for actuator sizes 1-5.
Flange dimensions for EN (code 10) with actuator sizes 1-5.
Flange dimensions for EN/ANSI (code 13, 47) with actuator sizes 1-5.
Clamp dimensions for DIN/ASME (code 80, 82, 86, 88) with actuator sizes 1-5.
Clamp dimensions for DIN/ASME (code 82, 86, 88) with actuator sizes 1-5.
Covers delivery, packaging, transport, and storage guidelines.
Safety warnings and preparation steps before installation.
Steps for installing with clamp connections and butt weld spigots.
Guidance for installing with threaded sockets, spigots, and flanged connections.
Explains connectors and specific requirements for gas applications.
Steps and warnings for commissioning the product.
Operating steps for Control Functions 1, 2, and 3.
A table listing errors, causes, and troubleshooting steps.
Identifies components and lists available spare parts.
Steps for actuator removal, seal replacement, and mounting.
Procedures for removal from piping, disposal, and product returns.
Official declaration regarding compliance with the Machinery Directive.
Declaration of conformity with the Pressure Equipment Directive.
