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Water Meter Fittings

Metal Bellows Expansion Joint

Flexible connector for thermal expansion, vibration and pipeline movement.

Metal Bellows Expansion Joint

Engineered around the medium, pressure, temperature and operating duty.

Product overview

Flexible metallic connector designed to absorb thermal expansion, vibration and controlled pipeline movement while maintaining pressure containment.

Greysen reviews the complete operating case before confirming the valve. Body style, wetted materials, sealing system, connection standard and operator are matched as one project configuration.

Typical technical specification

Nominal sizeDN25โ€“DN3000 (1โ€“120 in)
Pressure ratingDesigned to project pressure, temperature and movement
Body materialsStainless bellows with carbon or stainless end connections
Disc / trimOptional liner, tie rods, hinges or gimbal hardware
Seat / sealingWelded metallic pressure boundary
End connectionFlanged or weld-end
Design & testingEJMA design practice; ASME B31 piping requirements; project specification
Typical mediaWater, steam, gas and compatible process media

DESIGN DETAILS

Features and benefits

01

Valve construction

Bellows geometry is engineered for axial, lateral or angular movement.

02

Sealing performance

Optional liners protect convolutions from velocity or abrasive flow.

03

Reliable operation

Tie rods and restraints control pressure thrust where required.

04

Project flexibility

Design review considers cycles, temperature, pressure and installation length.

CONFIGURATION OPTIONS

Materials and sealing selection

Material combinations are reviewed against corrosion, erosion, temperature and required service life. The final approved data sheet defines every pressure-containing and wetted component.

Body

Stainless bellows with carbon or stainless end connections

Trim

Optional liner, tie rods, hinges or gimbal hardware

Seat & seals

Welded metallic pressure boundary

Connection

Flanged or weld-end

VALVE + OPERATOR

Operation and automation

Manual and automated packages are selected using the valve operating load, maximum differential pressure, required speed and available site utilities.

Manual operation

Lever, handwheel or gearbox options are matched to size, torque and access.

Pneumatic actuation

Double-acting or spring-return packages can include solenoid, switch box and positioner.

Electric actuation

On/off or modulating actuators are configured for voltage, duty, enclosure and control signal.

Package verification

Torque or thrust, safety factor, mounting interface, travel time and fail position are checked together.

APPLICATION REVIEW

Information for correct selection

  1. Nominal size, pressure class and mating connection standard.
  2. Medium, concentration, solids and minimum/maximum temperature.
  3. Normal and maximum differential pressure, flow rate and cycle frequency.
  4. Manual or actuated operation, fail position, control signal and required travel time.

Typical applications

  • Heating and steam lines
  • Power plants
  • Industrial process piping
  • Pump connections

Engineering checks

  • Pressure-temperature suitability
  • Material and media compatibility
  • Flow velocity and operating load
  • Installation orientation and maintenance access

PROJECT SUPPORT

Technical documentation

Request the documents required for consultant review, procurement and site handover. Availability is confirmed for the selected product and order.

  • Product data sheet
  • General arrangement drawing
  • Installation and maintenance guidance
  • Test and material documents when specified
Configuration note: Published ranges describe common industry configurations. Final dimensions, pressure-temperature limits, materials, certifications and standards are confirmed against the enquiry and approved data sheet.

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