Liquefied gas tank level measurement

3.6.2025

Liquefied gas tank level measurement

LPG Page 3

Nestekaasusäiliön mittarivastaanotin - LPG tank level monitoring

Nestekaasusäiliöiden ja ammoniakkisäiliöiden pinnanmittaus - LPG tank level measurement

Nestekaasusäiliön kaukovalvontajärjestelmä

Media

LPG

Manufacturers

Rochester Sensors

Technical Specifications

Equipment and devices: meter transmitters, meter receivers, remote monitoring systems, level control devices, level measurement devices
Other designations: LPG tank level measurement, liquid gas tank level measurement

What is liquefied gas tank level measurement?

Liquefied gas tank level measurement monitors the tank’s surface level and the quantity of gas. The measuring equipment includes meter transmitters, meter receivers, remote monitoring systems, level control devices, and level measurement devices.

Selection of liquefied gas tank level measurement devices

We always assist in selecting level measurement devices that meet the requirements of the application.

Monitoring the surface level of tanks is one of the most important measurement applications in the process industry. Both continuous level measurement and level switches are used when measuring the surface.

Rochester gauges – float level indicators transmit information about the storage tanks’ surface level to a mechanical pointer display. A transmitter can be integrated into the display, which sends the information to the control room or level monitoring system.

Factors influencing the selection of a float level transmitter include the medium, temperature, tank size, and installation method. In addition to mechanical float level transmitters, the range includes various devices for processing level data, such as current and voltage transmitters and converters. Float level transmitters are suitable for monitoring the surface levels of various liquids, such as chemicals and petrochemical products, propane, butane, ammonia, and refrigerants.

Level switches transmit the information that the surface has reached a predetermined height. The system controls the process based on this data.

A level indicator allows you to see locally at what height the surface is in the tank.

Meter Receivers for Liquid Gas

The message from the float level transmitter can be received, for example, by an analog volume indicator or by a low/high limit alarm installed in the control room.

Remote Monitoring Systems for Liquid Gas

With Rochester’s wired CSU-3 digital receiver, limit alarms can be transmitted directly to a PC. The device features adjustable fill limit alarms, a 4-20 mA output, and relay outputs.

Contact our representatives for more details.

Pressure equalizing valves

3.6.2025

Pressure equalizing valves

LPG Page 3

Paineentasausventtiili - double check vapor equalizing valve

Media

LPG

Manufacturers

REGO

Technical Data

Other designations: double check vapor equalizing valve

What is a pressure equalizing valve?

Equalizing valves are used, for example, when filling tanks. They equalize the pressure between two tanks when liquefied gas is transferred from one tank to another. When refueling a tanker, the vapor phase moves back to the storage tank.

Choosing a pressure equalizing valve

We help with the selection of a safety shut-off valve according to the requirements of the application. Ask our contact persons for more information.

Download brochures

REGO 7573 Series and 3183AC Double Check Vapor Equalizing Valves for ASME and DOT Containers

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Safety shut-off valves

3.6.2025

Safety shut-off valves

LPG Page 3

gAvilar safety shut off valve - turvasulkuventtiili

Media

LPG

Manufacturers

gAvilar

Technical specifications

Other names: safety shut-off valve

What is a safety shut-off valve?

The safety shut-off valve closes when the set pressure is exceeded. The safety shut-off valve is spring-loaded, and it is opened manually using the lever located on the side of the valve.

Choosing a safety shut-off valve

Safety shut-off valves are an essential part of the pressure reducing system. As the name suggests, it is a safety device that shuts off the gas flow when the gas pressure does not remain at the desired level. In Finland, almost exclusively the upper limit safety shut-off valve is used, which closes when the pressure becomes too high. Both land and liquefied petroleum gas legislation guide the selection of pressure control safety devices.

We assist in selecting a safety shut-off valve that meets the requirements of your application. Ask our contacts for more information.

Download brochures

gAvilar safety shut-off valve ssv sl eng

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Filling valves

3.6.2025

Filling valves

LPG Page 3

Media

LPG

Manufacturers

REGO

Technical Specifications

Other names: filler valve, single check filler valve, double check filler valve

What is a filler valve?

The design of the filler valve facilitates and speeds up the filling of the tank. Filler valves can be used as filling connections for fuel tanks, storage tanks, and mobile tanks.

The upper and lower parts of the filler valve can be serviced without removing the valve from the tank. The recoil features of the upper and lower parts are spring-loaded so that the filling connection closes after the flow stops. The stopper is attached to the valve by a chain.

Selecting a Filler Valve

We assist in choosing a filler valve that meets the requirements of the application. Contact our representatives for more information.

Download Brochures

Liquid Gas

REGO single check filler valves for storage tanks 3174c 3194c 6584c

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Gas filters

3.6.2025

Gas filters

LPG Page 3

Thielmann vzf zfg kaasusuodatin - gas filter

Media

Natural gas, biogas and biomethane

LPG

Manufacturers

ARI-Armaturen

GTS Thielmann Energietechnik

Marchel

Technical specifications

Other names: gas filtration

What is a Gas Filter?

Depending on the origin of the gas, it may contain various impurities. Particles may also dislodge from the piping or the storage tank into the gas. Installing a filter is an easy way to avoid damage and slow down the wear of more expensive equipment, such as pressure regulators and flow meters in the line.

Choosing a Gas Filter

The gas filter is chosen with an appropriate separation precision according to the process and installation conditions. The requirements for gas filtering can vary greatly, and our expert staff will help provide the exact type of filter for your needs. We offer filters for liquefied gas, natural gas, and biogas.

The equipment manufacturers we represent include, among others, GTS Thielmann, Marchel, and ARI-Armaturen.

Ask our contacts for more about filter selections.

Limit switches

3.6.2025

Limit switches

LPG Page 3

Media

Natural gas, biogas and biomethane

LPG

Process media

Gas and fuel

Steam and condensate

Cryogenic media

Manufacturers

Emme Technology (Max-Air)

Netherlocks

Rotork

Sofis

Technical specifications

Other names: valve limit switch, valve position indicator, signal box

What is a valve limit switch?

Using limit switches, the system can easily and reliably obtain, for example, valve open/close status data, which can be further transmitted electronically to the control system.

In mechanical models, a switch is installed on the valve yoke that opens or closes with the movement of the valve. In this way, information on whether the valve is open or closed is obtained.

The inductive switch sends a trigger signal when metal or another electrically conductive material approaches the sensing surface.

The operation of the magnetic switch is based on changes in the magnetic field when the valve yoke rises or falls.

Limit Switch Selection

Our program includes mechanical, inductive, and magnetic limit switches. We assist in selecting the limit switch that meets the application’s requirements, including for ATEX zones.

Netherlocks, part of the Sofis group, manufactures compact VPI open/closed limit packages, which can be installed on virtually any existing valve. Both on rotary-operating valves and on manually operated screw valves. Our installation service measures the necessary dimensions from the existing valve for the intermediary parts. After delivery, we proceed to install and set up the limit package.

Contact our representatives for more information.

Download Brochures

Max-Air BE41-BS42 Limit Switch Box

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Max-Air BE45 SERIES Box Micro Limit Switch Box

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Max-Air BE48 BS48 BM48 Ex Limit Swiches datasheet

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Sofis VPI Position Indicator

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Netherlocks VPI Position Indicator

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Rotork Limit Switch Boxes

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Valve positioners

3.6.2025

Valve positioners

LPG Page 3

TU-A-I Siemens Sipart valve positioner - venttiilin asennoitin

Media

Natural gas, biogas and biomethane

LPG

Process media

Gas and fuel

Steam and condensate

Cryogenic media

Manufacturers

Siemens

ARI-Armaturen

Technical specifications

Other names: valve positioner

What is a valve positioner?

The valve positioner usually converts a 4…20 mA current signal either into a proportional pneumatic output signal for a pneumatic actuator or drives a motor actuator in steps in the desired direction.

It is also possible to use a 0/2…10 V voltage signal or various digital fieldbus signals, such as Profibus, Fieldbus Foundation, or ASI, as a control signal.

Choosing a valve positioner

The SIPART PS2 digital valve positioner can be used in both linear and rotary pneumatic actuators, both single- and dual-acting. There is an option for the HART communication protocol, which allows for diagnosing the valve and tuning it using a programming device.

Digital and electro-pneumatic positioners from other manufacturers are also available according to customer needs.

We assist in selecting the appropriate positioner according to the requirements of the application. Ask our contacts for more information.

Download brochures

ARI-Armaturen STEVI-POS positioner

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Siemens Sipart PS2 Positioners datasheet

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Electric actuators

3.6.2025

Electric actuators

LPG Page 3

Toimilaitteelliset_kiilaluistiventtiilit

kiilaluistiventtiili sahkoisellä toimilaitteella

Media

Gas and fuel

Steam and condensate

Cryogenic media

Natural gas, biogas and biomethane

LPG

Process media

Manufacturers

AUMA

BERNARD CONTROLS

ARI-Armaturen

Rotork

Technical Specifications

Other names: motor actuator, electric actuator

What is an Electric Actuator?

Shut-off and regulating valves can be equipped with an actuator, allowing the valve to be controlled from a location other than in its immediate vicinity. Whereas pneumatic actuators use compressed air to operate, electric actuators use electricity.

In large actuators, short-circuit motors (synchronous motor) have traditionally been used, in which the valve is directed in the desired direction by changing the polarity of the rotor windings with alternating current. Actuators are supplied only for a specific voltage and frequency.

Brushless DC motors (BLDC) have become common in smaller actuators, enabling the use of 24 VDC as well as providing flexibility with AC voltages. For example, as standard, the ARI-Premio-Plus actuator operates within a voltage range of 90–264 VAC, 47–63 Hz.

The advantage of electric actuators is their significantly greater force output relative to their size compared to pneumatic actuators. Therefore, they are well suited for large, high-force valves such as wedge gate valves.

Selection of an Electric Actuator

We assist in selecting an electric actuator that meets the requirements of your application.

Our product portfolio includes ARI PREMIO electric linear actuators, whose power capacity is designed in a sensible and cost-effective manner for ARI shut-off and control valves. We also offer other electric actuators available on the market, such as AUMA, Bernard, and Rotork.

In our recorded webinar, we presented ARI-Armaturen’s PREMIO-PLUS 2G actuator.

Contact our representatives for more information about electric actuators.

Download Brochures

ARI-Armaturen ARI-PREMIO

Lataa PDF

ARI-Armaturen ARI-PREMIO-Plus 2G

Lataa PDF

ARI-PREMIO FAIL SAFE Electric Actuator with safety reset Datasheet

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ARI-Armaturen FR1.2_Electric Thrust Actuator Datasheet

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ARI-Armaturen FR2.1-2.2 Electric Thrust Actuator Datasheet

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ARI-Armaturen ARI-OM

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Pneumatic actuators

3.6.2025

Pneumatic actuators

LPG Page 3

ARI-Armaturen DP pneumatic actuator - pneumaattinen toimilaite

HEROSE toimilaitteellinen sulkuventtiili

Media

Process media

Gas and fuel

Steam and condensate

Cryogenic media

Natural gas, biogas and biomethane

LPG

Manufacturers

Rotork

SART von Rohr

ARI-Armaturen

Technical Specifications

Others: suitable for both linear and rotary movements
Other names: diaphragm actuator, pneumatic actuator, rack and pinion actuator, scotch-yoke actuator

What is a pneumatic actuator?

A shut-off valve can be equipped with an actuator, allowing the valve to be controlled from a location other than its immediate vicinity. In pneumatic actuators, compressed air controls the actuator to open or close.

In dual-action actuators, compressed air both opens and closes the valve.

In single-action models, the operation can be designed so that compressed air either opens or closes the valve, and an internal spring within the actuator performs the opposite movement if the compressed air is lost.

The advantages of a pneumatic actuator include its quick response and resistance to vibration compared to electric actuators.

Selecting a Pneumatic Actuator

Pneumatic actuators are divided into rotary actuators (90º / 120º) – which are suitable for ball, butterfly, and plug valves – and linear actuators, which are suitable for sleeve and slide valves.

Our stock of rotary actuators includes GT (gear) and RC (scotch-yoke) single- and dual-action pneumatic actuators. Upon request, we also equip valves with actuators from other brands.

In ARI-Armaturen sleeve valves, we use the factory’s own linear DP actuators.

Pneumatic actuators can be equipped with various limit packages, positioners, and solenoid valves.

We assist in selecting the pneumatic actuator that meets the requirements of your application. Contact our representatives for more information.

Download Brochures

Rotork GT-Range Pneumatic Actuators Datasheet

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Rotork RC200 Range

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ARI-Armaturen DP30-35 Pneumatic Actuators

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Level switches

3.6.2025

Level switches

LPG Page 3

säiliön pintakytkimet - tank level switch

Media

Steam and condensate

Cryogenic media

LPG

Process media

Gas and fuel

Manufacturers

GESTRA

Aplisens

Intra-Automation

Technical specifications

Other designations: level switch

What is a level switch?

Level switches transmit information to the system when the liquid reaches a predetermined height. The system then controls the process based on this information.

Level switch selection

We assist in selecting a level switch that meets the requirements of the application. Contact our representatives for more information.

Our range includes float switches that can be installed from the top or from the sides. The float switch is a traditional and quite cost-effective method for performing an on-off level measurement. Vertical models are available with several limit switches.

A somewhat more modern method is electrode measurement. Its advantage is that it is maintenance‐free, as the electrode does not have any so-called moving parts. Electrodes are clearly suitable for higher temperatures than float switches, making them applicable, for example, in steam boilers.

If limit switches are sufficient for level control, the best solution is the GESTRA conductive electrode, which can provide up to four separate limit signals. A compact model is also available, in which four separate voltage-free changeover contacts are integrated into the electrode.

Conductive level switches based on conductivity measure the resistance when immersed in the liquid. They are used for conductive liquids. Applications include dry run protection, prevention of overfilling, and on-off level control.

Limit switches are also available for magnetically controlled level indicators, providing limit data in addition to a local display.

Download brochures

Aplisens Type ERH Level Switch datasheet

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Intra-Automation Magnetically Controlled Liquid Level Indicator Type ITA

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Intra-Automation ITA Magnetic Sensing Transmitter

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Intra-Automation ITA Magnetic Multi-Float-Switch

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GESTRA NRGS11-2 NRGS16-2 Level Monitoring Datasheet

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GESTRA NRGS11-1 NRGS16-1 NRGS16-1S Level Monotoring Datasheet

Lataa PDF

WIKA Float Switch HSL-S HLS-P Datasheet

Lataa PDF

WIKA Float Switch FLS-S FLS-M FLS-P FLS-H

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