Editorial Technical Reference

Flow Regulator

This page explains how Flow Regulator is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A device that controls and maintains the flow rate of fluid samples within a sampling system.

Product Specifications

Technical details and manufacturing context for Flow Regulator

Definition
The Flow Regulator is a precision component used in the Sample Intake System of analytical and process equipment. Its primary function is to regulate the volumetric or mass flow rate of liquid or gas samples being drawn into the system, ensuring consistent sample delivery to downstream analyzers or collection points. By compensating for pressure variations, it maintains a set flow rate, which is critical for accurate sampling and analysis. The regulator operates by adjusting the cross-sectional area of the flow path using a variable orifice, needle valve, or diaphragm mechanism. An actuator—manual, pneumatic, or electric—positions the regulating element based on a setpoint signal or feedback from a flow sensor, creating a restriction that modulates flow despite upstream or downstream pressure changes. This component is typically made of Stainless Steel 316L, with PTFE seals for chemical compatibility. It is available in nominal diameters from DN15 to DN50 (ISO 6708), with a flow rate range of 0.1–10 L/min and an accuracy of ±2.5% (ISO 5167). Operating temperature ranges from -40°C to 85°C. Leakage rate is ≤0.01 mL/min at rated pressure (ISO 5208). Connections are female NPT threads from 1/4 to 1/2 inch (ASME B1.20.1). Weight varies from 0.5 to 2.5 kg depending on size. All values are reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. This directory entry is for informational purposes only and does not imply certification or compliance.
Working Principle
The Flow Regulator maintains a constant flow rate by adjusting the size of the flow passage. A variable orifice, needle valve, or diaphragm is positioned by an actuator, which may be manual, pneumatic, or electric. The actuator responds to a setpoint signal or feedback from a flow sensor, altering the cross-sectional area to compensate for pressure changes. This creates a controlled restriction that modulates the flow to the desired rate, ensuring stable sample delivery despite variations in upstream or downstream pressure.
Common Materials
Stainless Steel 316L
Technical Parameters
ParameterTypical rangeNotes & selection driver
Nominal DiameterDN15–DN50 mmMatches pipe sizeISO 6708
Flow Rate Range0.1–10 L/minAdjustable within range
Flow Accuracy±2.5 %Of set pointISO 5167
Operating Temperature-40–85 °CSeals degrade above 85°C
Leakage Rate≤0.01 mL/minAt rated pressure
Body Material316LCorrosion resistantASTM A276
Seal MaterialPTFEChemical compatibleASTM D4894
Connection Type1/4–1/2 NPTFemale threadsASME B1.20.1
Weight0.5–2.5 kgDepends on size

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Regulating Valve Body
    Houses the flow control mechanism and provides fluid connections
    Material: Stainless Steel 316L
  • Actuator
    Provides the force to position the regulating element (manual handle, pneumatic piston, or electric motor)
    Material: Aluminum Alloy
  • Seals/Gaskets Part
    Ensure leak-proof operation at connections and moving parts
    Material: PTFE (Teflon) or FKM (Viton)
  • Needle Valve Optional
    Regulating element positioned by the actuator to set the flow passage.
  • Variable Orifice Optional
    Adjustable restriction that modulates the sample flow.
  • Diaphragm Optional
    Flexing element that varies the passage cross-section.
  • Flow Sensor Optional
    Provides the feedback the actuator position is corrected against.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Flow Regulator.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 100 bar
flow rate: 0.1 to 10 L/min
temperature: -20°C to 150°C
Media Compatibility
✓ Water-based fluids ✓ Hydraulic oils ✓ Chemical process liquids
Unsuitable: Highly abrasive slurries with >20% solids or corrosive acids
Sizing Data Required
  • Required flow rate (L/min)
  • System pressure (bar)
  • Fluid viscosity (cP)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Cavitation damage
Cause: Pressure drop below vapor pressure causing bubble formation and implosion, eroding internal surfaces and degrading sealing components.
Sticking or binding of control mechanism
Cause: Accumulation of particulate contaminants, corrosion products, or mineral deposits interfering with moving parts and preventing proper flow adjustment.
Maintenance Indicators
  • Unusual whistling or hissing noise indicating cavitation or internal leakage
  • Visible external leakage around seals or connections, or erratic/unstable flow despite control adjustments
Engineering Tips
  • Install upstream strainers/filters and maintain clean fluid systems to prevent particulate ingress and reduce wear on internal components.
  • Ensure proper pressure differentials across the regulator (avoid excessive pressure drops) and use cavitation-resistant trim materials where applicable.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 13845:2015 (Pressure regulators for medical gas systems) ANSI/ASME B16.34 (Valves - Flanged, Threaded, and Welding End) DIN EN 334 (Gas pressure regulators for inlet pressures up to 100 bar)

Quoted from the published standard.

Manufacturing Precision
  • Bore diameter: +/-0.02 mm
  • Flatness of sealing surfaces: 0.1 mm
Quality Inspection
  • Pressure decay leak test
  • Flow coefficient (Cv) verification test

Manufacturers of Flow Regulator

5 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Bobst Hydraulic Machinery Co., Ltd.
Jiangsu, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Flow Regulator Valves”
View source page ↗ bosthydraulic.com · checked 2026-09-14
Convista
Beijing, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Axial Flow Regulator”
View source page ↗ convistafc.com · checked 2026-08-28
Prius pneumatic Company
Zhejiang, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Air Flow Regulator Valve”
View source page ↗ pneumaticaircylinders.com · checked 2026-08-30
Qingdao Forterra Gas Co., Ltd.
Qingdao, Shandong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Constant Flow Regulators”
View source page ↗ forterra.cn · checked 2026-09-13
WEGO Medical
Hong Kong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “IV Flow Regulator”
View source page ↗ wegomedical.com · checked 2026-09-04

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Frequently Asked Questions

What is the flow rate range of this regulator?

The flow rate range is 0.1 to 10 L/min, adjustable within that range. This is a reference value; confirm the exact range for your specific model and application with the manufacturer.

What materials are used in construction?

The body is made of Stainless Steel 316L, and the seals are PTFE. These materials provide corrosion resistance and chemical compatibility, but verify suitability for your specific fluid and conditions.

What are the operating pressure and temperature limits?

The operating temperature is -40°C to 85°C. Note that seals degrade above 85°C. Always verify these limits for your application.

What connection types are available?

Connections are female NPT threads, sizes 1/4 to 1/2 inch, per ASME B1.20.1. Ensure compatibility with your piping system.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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