GEM 550 - User Manual

Other manuals for GEM 550

Installation, Operating And Maintenance Instructions44 pages

Installation, Operating, & Maintenance Instructions44 pages

Questions and Answers

M
Matthew RobertsAug 20, 2025
Why is my GEM 550 product leaking downstream?
- P
  Patrick ReedAug 20, 2025
  If your GEM Control Unit product is leaking downstream, it might be due to several reasons: the operating pressure could be too high (operate the product with operating pressure specified in datasheet); there might be foreign matter between the seat seal and seat (remove the actuator, remove any foreign matter, and check the seat seal for damage, replacing it if necessary); the valve body may be damaged (check the valve body for damage and replace the valve if needed); the seat seal could be faulty (check the seat seal for damage and replace it if necessary); or the actuator spring might be faulty (replace the actuator).
T
Travis HernandezAug 22, 2025
What to do if GEM 550 Control Unit does not open fully?
- A
  Ariana LongAug 22, 2025
  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).
M
Marisa PhillipsAug 25, 2025
How to fix GEM Control Unit leaking between actuator and valve body?
- B
  Billy WilliamsAug 25, 2025
  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).
M
matthewsdianaAug 26, 2025
What causes GEM Control Unit valve body to leak?
- J
  Jeanette GallowayAug 26, 2025
  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.
N
Nicole PughAug 27, 2025
What to do if GEM 550 Control Unit connection between valve body and piping is leaking?
- R
  Robert MackAug 28, 2025
  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).
A
anthony41Aug 30, 2025
What causes control medium escaping from leak detection hole in GEM Control Unit?
- P
  Paul JohnsonAug 30, 2025
  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.
C
Christopher HarveyAug 31, 2025
Why is control medium escaping from vent hole in GEM 550 Control Unit?
- W
  warnoldSep 1, 2025
  If control medium is escaping from the vent hole in the actuator cover of your GEM Control Unit, it's likely due to a leaking control piston. You should replace the actuator and check the control medium for impurities.
W
wayne01Sep 2, 2025
What to do if working medium escaping from leak detection hole in GEM 550 Control Unit?
- D
  Donald AdamsSep 2, 2025
  If the working medium is escaping from the leak detection hole in your GEM Control Unit, it's likely because the gland packing is faulty. Replace the actuator to resolve this issue.
R
Renee PalmerSep 4, 2025
Why doesn't my GEM Control Unit valve open fully?
- K
  Keith JohnsonSep 4, 2025
  If the GEM Control Unit valve isn't opening fully, several factors could be at play. First, the control pressure might be too low; in this case, set the control pressure in accordance with the data sheet and check/replace the pilot valve if needed. Also, ensure the control medium is properly connected. A leaky control piston or spindle sealing could also be the culprit, so replace the actuator and check the control medium for impurities. Finally, if you have a control function NO, the actuator spring might be faulty, requiring actuator replacement.
B
bbrownSep 6, 2025
What to do if GEM Control Unit valve leaks downstream?
- T
  taylorthomasSep 6, 2025
  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.

GEM 550 Specifications

General

Brand	GEM
Model	550
Category	Control Unit
Language	English

Summary

General Information and Safety

Document Structure and Terms

Explains document scope, symbols, definitions, and warning note system.

Key Document Elements

Details symbols used and defines terms like working medium and control function.

Product Description and Safety

Safety Information Overview

General safety information for installation, operation, and maintenance.

Product Construction and Components

Details the components and materials of the GEMÜ 550 valve.

Product Functionality and Control

Valve Operation and Control Functions

Explains how the product controls flowing medium and its control functions.

Flow Direction and Vent Hole System

Illustrates flow direction and describes the actuator vent hole.

GEMÜ CONEXO System Integration

Product Label and CONEXO Features

Explains product label data and CONEXO system benefits for traceability and service.

Correct Product Usage and Safety

Safe Operation and Explosion Protection

Details correct usage, including explosion protection and general guidelines.

Order Data and Product Selection

Standard Configurations and Order Codes

Provides an overview of standard configurations and order codes for the GEMÜ 550.

Order Options and Specifications

Design Types and Special Versions

Lists design types, special versions, and CONEXO options.

Technical Data: Medium, Temp, Pressure

Media, Viscosity, and Temperature Limits

Specifies working/control media, viscosity, and temperature ranges.

Operating Pressure (NC Under Seat)

Presents operating pressure data for Control Function 1 (NC) under the seat.

Technical Data: Operating Pressure (NC Over Seat)

Operating Pressure Data (NC Over Seat)

Shows operating pressure for Control Function 1 (NC) over the seat.

Technical Data: Control Pressure Graphs

Control Pressure vs. Operating Pressure (NC)

Graphs relating control pressure to operating pressure for NC function.

Technical Data: Control Pressure Graphs

Control Pressure vs. Operating Pressure (NC)

Graphs relating control pressure to operating pressure for NC function.

Technical Data: Volumes, Rates, Correlations

Filling Volume and Leakage Rate Data

Shows filling volume, piston diameter, and leakage rate.

Pressure-Temperature Operating Limits

Details maximum allowable operating pressures at various temperatures.

Technical Data: Product Conformity

Kv Values and Regulatory Compliance

Table of Kv values and lists regulations for Food, PED, and Machinery Directives.

Technical Data: Gas and Explosion Safety

Gas Standards and ATEX Certification

Specifies gas standards and ATEX availability for explosion protection.

Mechanical Data: Product Weights

Actuator and Valve Body Weights

Tables showing actuator and body weights based on DN and connection type.

Dimensions: Actuator Specifications

Actuator Dimension Details

Diagrams and table showing actuator dimensions (ØB, M, H max, G, A2).

Dimensions: Installation (2;2-way Body)

2;2-Way Body Installation Dimensions

Details installation dimensions for 2/2-way bodies with different actuator sizes.

Dimensions: Installation (Angle Valve Body)

Angle Valve Body Installation Dimensions

Shows installation dimensions for angle valve bodies with different actuator sizes.

Dimensions: Body (Spigot DIN;EN;ISO;ASME - Size 0)

Spigot Body Dimensions (Actuator Size 0)

Lists body dimensions for spigot DIN/EN/ISO/ASME (actuator size 0).

Dimensions: Body (Spigot DIN;EN;ISO;ASME - Sizes 1-5)

Spigot Body Dimensions (Actuator Sizes 1-5)

Body dimensions for spigot DIN/EN/ISO/ASME (actuator sizes 1-5).

Dimensions: Body (Stutzen EN;ISO)

Stutzen EN;ISO Body Dimensions

Body dimensions for spigot EN/ISO (actuator sizes 1-5).

Dimensions: Body (Spigot EN;ISO;ASME)

Spigot EN;ISO;ASME Body Dimensions

Body dimensions for spigot EN/ISO/ASME (actuator sizes 1-5).

Dimensions: Body (Threaded Socket D - Size 0)

Threaded Socket DIN;NPT Body Dimensions (Size 0)

Body dimensions for threaded socket DIN/NPT (actuator size 0).

Dimensions: Body (Threaded Socket D - Sizes 1-5)

Threaded Socket DIN;Rc;NPT Body Dimensions (Sizes 1-5)

Body dimensions for threaded socket DIN/Rc/NPT (actuator sizes 1-5).

Dimensions: Body (Threaded Socket E - Sizes 1-5)

Threaded Socket DIN;NPT Body Dimensions (Sizes 1-5)

Body dimensions for threaded socket DIN/NPT (actuator sizes 1-5).

Dimensions: Body (Threaded Spigot DIN - Size 0)

Threaded Spigot DIN Body Dimensions (Size 0)

Body dimensions for threaded spigot DIN (code 9) for actuator size 0.

Dimensions: Body (Threaded Spigot DIN - Sizes 1-5)

Threaded Spigot DIN Body Dimensions (Sizes 1-5)

Body dimensions for threaded spigot DIN (code 9) for actuator sizes 1-5.

Dimensions: Body (Flange EN)

Flange EN Body Dimensions (Code 10)

Flange dimensions for EN (code 10) with actuator sizes 1-5.

Dimensions: Body (Flange EN;ANSI)

Flange EN;ANSI Body Dimensions (Codes 13, 47)

Flange dimensions for EN/ANSI (code 13, 47) with actuator sizes 1-5.

Dimensions: Body (Clamp DIN;ASME)

Clamp DIN;ASME Body Dimensions (Codes 80, 82, 86, 88)

Clamp dimensions for DIN/ASME (code 80, 82, 86, 88) with actuator sizes 1-5.

Dimensions: Body (Clamp DIN;ASME)

Clamp DIN;ASME Body Dimensions (Codes 82, 86, 88)

Clamp dimensions for DIN/ASME (code 82, 86, 88) with actuator sizes 1-5.

Manufacturer Info & Installation Prep

Manufacturers Information Sections

Covers delivery, packaging, transport, and storage guidelines.

Installation Preparation and Safety

Safety warnings and preparation steps before installation.

Piping Installation Procedures

Clamp Connections & Butt Weld Spigots

Steps for installing with clamp connections and butt weld spigots.

Piping Installation Procedures (Cont.)

Threaded Sockets, Spigots, and Flanges

Guidance for installing with threaded sockets, spigots, and flanged connections.

Pneumatic Connections and Gas Use

Control Connectors and Gas Application Requirements

Explains connectors and specific requirements for gas applications.

Commissioning and Product Operation

Commissioning Steps and Safety Warnings

Steps and warnings for commissioning the product.

Operating Control Functions (1, 2, 3)

Operating steps for Control Functions 1, 2, and 3.

Troubleshooting Common Issues

Error Causes and Resolution Steps

A table listing errors, causes, and troubleshooting steps.

Inspection and Maintenance Procedures

Component ID and Spare Parts List

Identifies components and lists available spare parts.

Maintenance: Actuator and Seals

Actuator Removal, Seal Replacement, Mounting

Steps for actuator removal, seal replacement, and mounting.

Product End-of-Life Procedures

Removal, Disposal, and Returns Process

Procedures for removal from piping, disposal, and product returns.

Machinery Directive Compliance Declaration

Declaration of Incorporation (Machinery Directive)

Official declaration regarding compliance with the Machinery Directive.

Pressure Equipment Directive Compliance Declaration

Declaration of Conformity (Pressure Equipment Directive)

Declaration of conformity with the Pressure Equipment Directive.

Related product manuals

GEM 550 - User Manual

Table of Contents

Other manuals for GEM 550

Questions and Answers

GEM 550 Specifications

Summary

General Information and Safety

Document Structure and Terms

Key Document Elements

Product Description and Safety

Safety Information Overview

Product Construction and Components

Product Functionality and Control

Valve Operation and Control Functions

Flow Direction and Vent Hole System

GEMÜ CONEXO System Integration

Product Label and CONEXO Features

Correct Product Usage and Safety

Safe Operation and Explosion Protection

Order Data and Product Selection

Standard Configurations and Order Codes

Order Options and Specifications

Design Types and Special Versions

Technical Data: Medium, Temp, Pressure

Media, Viscosity, and Temperature Limits

Operating Pressure (NC Under Seat)

Technical Data: Operating Pressure (NC Over Seat)

Operating Pressure Data (NC Over Seat)

Technical Data: Control Pressure Graphs

Control Pressure vs. Operating Pressure (NC)

Technical Data: Control Pressure Graphs

Control Pressure vs. Operating Pressure (NC)

Technical Data: Volumes, Rates, Correlations

Filling Volume and Leakage Rate Data

Pressure-Temperature Operating Limits

Technical Data: Product Conformity

Kv Values and Regulatory Compliance

Technical Data: Gas and Explosion Safety

Gas Standards and ATEX Certification

Mechanical Data: Product Weights

Actuator and Valve Body Weights

Dimensions: Actuator Specifications

Actuator Dimension Details

Dimensions: Installation (2;2-way Body)

2;2-Way Body Installation Dimensions

Dimensions: Installation (Angle Valve Body)

Angle Valve Body Installation Dimensions

Dimensions: Body (Spigot DIN;EN;ISO;ASME - Size 0)

Spigot Body Dimensions (Actuator Size 0)

Dimensions: Body (Spigot DIN;EN;ISO;ASME - Sizes 1-5)

Spigot Body Dimensions (Actuator Sizes 1-5)

Dimensions: Body (Stutzen EN;ISO)

Stutzen EN;ISO Body Dimensions

Dimensions: Body (Spigot EN;ISO;ASME)

Spigot EN;ISO;ASME Body Dimensions

Dimensions: Body (Threaded Socket D - Size 0)

Threaded Socket DIN;NPT Body Dimensions (Size 0)

Dimensions: Body (Threaded Socket D - Sizes 1-5)

Threaded Socket DIN;Rc;NPT Body Dimensions (Sizes 1-5)

Dimensions: Body (Threaded Socket E - Sizes 1-5)

Threaded Socket DIN;NPT Body Dimensions (Sizes 1-5)

Dimensions: Body (Threaded Spigot DIN - Size 0)

Threaded Spigot DIN Body Dimensions (Size 0)

Dimensions: Body (Threaded Spigot DIN - Sizes 1-5)

Threaded Spigot DIN Body Dimensions (Sizes 1-5)

Dimensions: Body (Flange EN)

Flange EN Body Dimensions (Code 10)

Dimensions: Body (Flange EN;ANSI)

Flange EN;ANSI Body Dimensions (Codes 13, 47)

Dimensions: Body (Clamp DIN;ASME)

Clamp DIN;ASME Body Dimensions (Codes 80, 82, 86, 88)

Dimensions: Body (Clamp DIN;ASME)

Clamp DIN;ASME Body Dimensions (Codes 82, 86, 88)

Manufacturer Info & Installation Prep

Manufacturers Information Sections

Installation Preparation and Safety

Piping Installation Procedures

Clamp Connections & Butt Weld Spigots

Piping Installation Procedures (Cont.)

Threaded Sockets, Spigots, and Flanges