Precise downstream pressure control for industrial gas distribution systems. Line regulators provide secondary pressure reduction and controlled gas delivery within industrial, laboratory, specialty and process gas distribution systems. They are typically installed downstream of the primary source regulator, manifold or pressure-control system to establish the pressure required by a distribution branch, process area or point of use.
Line-mounted pressure control in a distribution assembly
Function
Secondary pressure reduction
Installation
Pipeline / panel / point of use
Pressure control
Downstream regulation
Applications
Industrial & specialty gas
Pressure architecture
Pressure Control Within the Distribution System
A gas system may require pressure reduction at more than one location. The primary regulator located near the cylinder, manifold, tank or gas source typically reduces source pressure to a suitable distribution pressure.
A line regulator can then be installed further downstream to reduce that pressure again to the level required by a particular branch, machine, laboratory, process or point-of-use station. Line regulators can therefore help create different pressure zones within a common gas distribution system.
Source regulation → distribution pressure → line regulation → point-of-use pressure.
Distribution piping after primary regulation
System position
Where Does a Line Regulator Fit in a Gas System?
Unlike a cylinder regulator, a line regulator is generally installed within the downstream distribution system where pressure must be controlled closer to the process or equipment being supplied.
01
Gas Source
Cylinder, cryogenic tank or other upstream supply.
02
Primary Regulator / Manifold
Source-side pressure reduction and bank management.
03
Gas Distribution Pipeline
The header that carries regulated distribution pressure.
04
Line Regulator
Secondary reduction to the pressure required by a branch or area.
05
Local Pressure Gauge
Indication of the downstream condition where instrumentation is specified.
06
Isolation Valve
Isolation of the branch, station or equipment as required by the design.
07
Machine / Process / Point of Use
The consuming equipment or final delivery point.
Function
Why Use a Line Regulator?
01
Local Pressure Control
Establish the pressure required by a specific branch or piece of equipment.
02
Multiple Pressure Zones
Allow different areas of the same gas system to operate at different downstream pressures.
03
Equipment Protection
Help prevent downstream equipment from being exposed to higher distribution pressures than required.
04
Process Control
Provide pressure adjustment closer to the process consuming the gas.
05
Distribution Flexibility
Support larger facilities where gas is distributed across multiple departments or machines.
06
System Expansion
Allow additional branches or equipment to be integrated with appropriate downstream pressure control.
Configuration choice
Line Regulator vs Cylinder Regulator
Comparison of cylinder or primary regulators and line regulators
Feature
Cylinder / primary regulator
Line regulator
Typical location
Gas source
Distribution pipeline
Primary function
Reduce source pressure
Secondary pressure reduction
Installation
Cylinder / manifold / source
Pipeline / panel / point of use
Upstream source
Cylinder or manifold pressure
Regulated distribution pressure
Downstream supply
Distribution system
Equipment, branch or process
Typical purpose
Establish system supply pressure
Establish local operating pressure
Exact system architecture depends on gas type, pressure, flow requirements and the overall gas distribution design.
Regulator configuration and gas compatibility must be verified for the specific application. Not every line regulator is suitable for every listed environment.
Point-of-use supply after line regulationPanel-mounted line regulation
01
Industrial gas pipelines
02
Manufacturing equipment
03
Laser and cutting gas systems
04
Welding gas distribution
05
Laboratory gas systems
06
Specialty gas distribution
07
Pharmaceutical facilities
08
Research laboratories
09
Analytical instruments
10
Process gas systems
11
Food and beverage gas systems
12
Gas panel installations
Materials in contact with the gas
Line Regulators for Different Gas Services
Gas compatibility depends on regulator construction materials, wetted components, seats, seals, cleanliness, pressure and application requirements. One regulator configuration is not automatically compatible with all gases.
Nitrogen
Inert and process supply where material compatibility is confirmed for the service.
Oxygen
Requires materials, cleanliness and procedures appropriate to oxygen service. Confirm before selection.
Argon
Welding, fabrication and process supply as specified for the application.
Helium
Specialty and process service where the regulator construction matches the gas.
Carbon Dioxide
Process and utility supply according to pressure, phase and material constraints.
Hydrogen
Fuel and process service only where the construction is verified for hydrogen.
Compressed air
Utility air only where the regulator construction matches the service and cleanliness requirement.
Specialty gases
Mixture and high-purity services as defined by the gas specification and cleanliness requirement.
Process gases
Application-specific process streams verified against materials, pressure and installation conditions.
For oxygen service, appropriate oxygen-compatible materials and cleanliness procedures may be required.
Installation
Typical Line Regulator Station
The exact valve, gauge and pressure-protection arrangement should be determined by the system design and project requirements. This diagram is not a universal mandatory configuration. Additional safety components are application-specific.
01
Upstream Gas Pipeline
The distribution line carrying pressure into the station.
02
Isolation Valve
Upstream isolation as specified for the station.
03
Pressure Gauge
Inlet indication where instrumentation is included.
04
Line Regulator
Secondary pressure reduction for the branch or equipment.
05
Downstream Pressure Gauge
Outlet indication where instrumentation is included.
06
Isolation Valve
Downstream isolation as specified for the station.
07
Equipment / Distribution Branch
The consuming equipment or continuing distribution path.
Engineering data
Technical Specifications
Values below are configuration dependent. Exact ratings come from the applicable regulator model and manufacturer datasheet, not from this page.
Configuration-dependent specifications for line gas regulators
Specification
Requirement / configuration
Product Type
Line gas regulator
Function
Secondary pressure reduction
Gas Service
Application specific
Inlet Pressure
Configuration specific
Outlet Pressure
Configuration specific
Flow Capacity
Configuration specific
Regulation
Single / multi-stage depending on configuration
Body Material
Configuration specific
Wetted Materials
Gas specific
Diaphragm Material
Configuration specific
Seat Material
Configuration specific
Inlet Connection
Configuration specific
Outlet Connection
Configuration specific
Pressure Gauge
Optional / system specific
Mounting
Inline / panel / wall / point-of-use
Temperature Range
Configuration specific
Body and wetted parts
Materials Selected for the Gas Service
Line-regulator material selection depends on gas compatibility, purity requirements, pressure, temperature, corrosion resistance, installation environment and process requirements. A given material is not always suitable for a given gas.
Stainless steel
Brass
Application-specific alloys
Compatible diaphragm materials
Gas-compatible seats and seals
Source manifold before the distribution header
Pressure zoning
Creating Multiple Pressure Zones
Line regulation can allow a common upstream gas supply to feed multiple downstream branches requiring different operating pressures. Numerical set-points are defined per project, not on this page.
Central gas source
Main distribution pressure
Production Line A
Line regulator → Pressure Zone A
Production Line B
Line regulator → Pressure Zone B
Laboratory
Line regulator → Pressure Zone C
Sizing
Pressure and Flow Must Be Considered Together
Selecting a line regulator based only on pressure is insufficient. The regulator should also support the gas-flow requirements of the downstream equipment.
Normal flow
Expected continuous consumption of the downstream equipment or branch.
Peak flow
Maximum temporary demand that the regulator must support.
Inlet pressure
Available pressure upstream of the line regulator.
Required outlet pressure
Pressure required by the downstream equipment.
Allowable pressure variation
How stable the downstream process pressure needs to remain.
Future capacity
Potential additional equipment or branch expansion.
Selection
How to Select a Line Regulator
01
Identify the gas
Confirm the gas and material compatibility requirements.
02
Determine available inlet pressure
Establish the pressure present in the upstream distribution line.
03
Define required outlet pressure
Determine the operating pressure required downstream.
04
Determine flow demand
Establish normal and peak flow requirements.
05
Evaluate pressure stability
Consider how stable downstream pressure must remain under changing demand.
06
Select materials
Choose suitable materials for the gas and service environment.
07
Determine connections
Match the regulator to the pipe or tube distribution system.
08
Review system protection
Consider instrumentation, isolation and pressure-relief requirements.
Available configurations depend on gas service, pressure, flow and project requirements. This is not a claim that every configuration is stocked or manufactured by PES for every gas.
01Stainless-steel line regulator
02Brass line regulator
03High-purity line regulator
04High-flow line regulator
05Panel-mounted line regulator
06Inline gas regulator
07Point-of-use line regulator
08Gauge-equipped line regulator
Panels
Line Regulators Within Gas Control Panels
Line regulators can also be integrated into engineered gas panels. Final panel content is selected according to the gas service and project requirements.
Prema Engineering Services can integrate line regulation with gas sources, manifolds, pressure-control systems, pipelines, instrumentation, isolation valves, safety components and point-of-use equipment.
Correct Pressure Control Starts With System Design
Appropriate line-regulator operation depends on correct gas compatibility, maximum upstream pressure, required downstream pressure, flow capacity, component pressure ratings, correct installation, isolation, instrumentation, pressure protection where required, appropriate testing, and manufacturer maintenance requirements.
This page does not claim leak-tightness, zero failure, maintenance-free service, universal gas compatibility or guaranteed safety. Testing and documentation are included according to project scope.
FAQ
Line Regulator FAQs
What is a line regulator?+−
A line regulator is a pressure regulator installed within a gas distribution pipeline to reduce upstream line pressure to the pressure required by a downstream branch, process or piece of equipment.
What is the difference between a line regulator and a cylinder regulator?+−
A cylinder regulator normally performs primary pressure reduction at the gas source. A line regulator generally performs secondary pressure reduction further downstream.
Where should a line regulator be installed?+−
It may be installed in a gas pipeline, gas panel, distribution branch or near the point of use depending on system requirements.
Can one gas pipeline have multiple line regulators?+−
Yes. Properly engineered systems may use multiple line regulators to establish different pressure zones for different processes or equipment.
What gases can line regulators handle?+−
This depends on the regulator materials, seals, seat construction, cleanliness and pressure configuration. Compatibility must be verified for each gas service.
How do I select the correct line regulator?+−
Provide gas type, available inlet pressure, required outlet pressure, normal and peak flow, connection details and installation requirements. PES reviews those fields as part of the gas-system design.
Is a line regulator the same as a pressure reducing valve?+−
Both provide pressure reduction, but terminology and equipment construction can differ depending on the gas system and application.
Does every machine need a line regulator?+−
No. The need for secondary or point-of-use regulation depends on the distribution pressure and equipment operating requirements.
Related equipment
Related Pressure Control Equipment
Links open published PES pages. High-pressure and high-flow types that do not yet have a dedicated product page open the Gas Regulators family page. Point-of-use regulation is covered on Pressure Control until a dedicated page is published.
