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Tech Master GPT420 Two Stage 2 Gauge Cylinder Regulator (Oxygen/Inert)
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Tech Master GPT420 Two Stage 2 Gauge Cylinder Regulator (Oxygen/Inert) - Side Entry, 50 bar, Grade 4.5

GPT421-04-10-01-01-010-07-A/3960024321 Gas Arc In Stock Fast Dispatch
Price per unit
£590.00 ex VAT
£708.00 inc VAT
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Was £ ex VAT
  • Designed for constant delivery pressure.
  • Suitable for technical gases up to 4.5 purity.
  • Inlet Connection BS 341 No.3, Outlet Connection 3/8 BSP RH Male
  • Brass barstock body and bonnet with FKM seal.
  • Supplied with a Certificate of Conformity
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4.5 Purity Two Stage Brass Barstock Piston Cylinder Regulator

GPT421 Series | Two Stage Piston Cylinder Regulator, FKM Seal

Comprising of: Cylinder Connection, Cylinder Contents Gauge, Outlet Pressure Gauge, Outlet Connection

Please note: If you require a test certificate with your regulator, it must be ordered at the same time. Our certification product can be found here: Gas Arc Regulator Test Certificate

The Tech Master GPT420 Series two stage piston cylinder regulators are designed for primary pressure gas control of non-corrosive or toxic, technical gases up to grade 4.5 purity (99.995%), on applications where constant delivery pressure is required as the cylinder pressure decreases.

Features & Benefits

  • Five port configuration
  • Front panel mounting capabilities
  • Encapsulated seat design
  • Low wetted surface area
  • Full range of inlet and outlet fittings
  • Base and side entry

Gas Compatibility

This regulator is configured for Oxygen/Inert

It is also available for the following gas types:

Body Brass Barstock
Bonnet Brass Barstock
Piston Brass
Seal FKM
Valve Seat Polyamide (Nylon®)
Filter 10 Micron 316L Stainless Steel
Maximum Inlet Pressure 300 bar (4350 PSI)*
Delivery Pressure Range 20 bar (300 PSI) / 50 bar (725 PSI)
Temperature Range -20° C to +60° C (-4° F to +140° F)
Gauges 50mm (2″) Diameter
Weight 2.1 kg (4.7 lbs)**
Connections Inlet BS 341 No.3 , Outlet 3/8 BSP RH Male

* Subject to cylinder connection – ** Cylinder connection not included

Flow Performance

GPT420 flow performance

Technical Drawings

GPT420 Diagram

Model Number Selector Guide

For custom configuration please use the following table to create a model number and contact us for our best price (Example Model Number: GPT421-02-07-00-00-000-00-A)

Product Type Inlet Pressure (Bar / PSI) Outlet Pressure (Bar / PSI) Inlet Pressure Gauge Outlet Pressure Gauge Inlet Connection Outlet Connection Options
GPT421 02 – 60 bar (870 PSI) 07 – 0 to 20 (300 PSI) 00 – No Gauge Fitted 00 – No Gauge Fitted 000 – 1/4″ NPT Female 00 – 1/4″ NPT Female A – No Options Selected
GPT422 04 – 300 bar (4350 PSI) 10 – 0 to 50 (725 PSI) 01 – bar/PSI 01 – bar/PSI 001 – 1/8 Stainless Steel Compression 01 – 1/8 Stainless Steel Compression F – Bonnet Vent Kit
10 – Plugged Port 10 – Plugged Port 002 – 1/4 Stainless Steel Compression 02 – 1/4 Stainless Steel Compression K – Certificate of Conformity (CoC)
003 – 6mm Stainless Steel Compression 03 – 6mm Stainless Steel Compression L – Panel Mount Locking Nut Kit
004 – 1/4 NPT Male 04 – 1/4 NPT Male P – Calibration / Pressure Test Certificate
007 – G3/8 BSP R/H Brass Male 05 – 1/4 SAE Flare Brass Male X – Special Instruction
008 – G3/8 BSP L/H Brass Male 06 – G1/2 BSP R/H Brass Male
009 – BS341 No.3 (Base Entry) 07 – G3/8 BSP R/H Brass Male
010 – BS341 No.3 08 – G3/8 BSP L/H Brass Male
011 – BS341 No.4 (Base Entry) 09 – Isolation Valve, 1/4 NPT Female, FKM Seal
012 – BS341 No.4 10 – Isolation Valve, 1/4 NPT Female, EPDM Seal
015 – BS341 No.8 11 – Isolation Valve, 1/8 Stainless Steel Compression, FKM Seal
030 – DIN477 No.6 12 – Isolation Valve, 1/8 Stainless Steel Compression, EPDM Seal
033 – DIN477 No.9 13 – Isolation Valve, 1/4 Stainless Steel Compression, FKM Seal
034 – DIN477 No.10 14 – Isolation Valve, 1/4 Stainless Steel Compression, EPDM Seal
045 – CGA320 15 – Isolation Valve, 6mm Stainless Steel Compression, FKM Seal
052 – CGA540 16 – Isolation Valve, 6mm Stainless Steel Compression, EPDM Seal
053 – CGA580 17 – Isolation Valve, 1/4 NPT Male, FKM Seal
18 – Isolation Valve, 1/4 NPT Male, EPDM Seal
19 – Isolation Valve, G3/8 BSP R/H Brass Male, FKM Seal
20 – Isolation Valve, G3/8 BSP R/H Brass Male, EPDM Seal
Brand Gas Arc
shopping_price_ranges 200 - 500
Inlet Connection BS341 No.3
Inlet Pressure 300 bar
Entry Point Base Entry, Side Entry
Outlet Connection 3/8 BSP Male Right Hand Outlet
Outlet Pressure 20 bar, 50 bar
Gas Type Oxygen/Inert
Stages Multi Stage
Purity Grade Grade 4.5
SKU Entry Point Outlet Pressure Purity Grade Stock Status  
GPT421-04-10-01-01-010-07-A/3960024321 side entry 50 bar grade 4 5 In Stock £590.00 ex VAT £708.00 inc VAT
GPT421-04-07-01-01-010-07-A/3960024543 side entry 20 bar grade 4 5 In Stock £590.00 ex VAT £708.00 inc VAT
GPT421-04-10-01-01-009-07-A/3960007843 base entry 50 bar grade 4 5 In Stock £590.00 ex VAT £708.00 inc VAT
GPT421-04-07-01-01-009-07-A/3960023652 base entry 20 bar grade 4 5 In Stock £590.00 ex VAT £708.00 inc VAT

Tech-Master-GPT420-Regulator-Datasheet.pdf

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A carriage charge is applied to orders, for standard 1-2 day shipments to mainland destinations within the United Kingdom. Other destinations and premium services are available but subject to additional freight charges.

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01752 936 028

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12 Mary Seacole Road
The Millfields
Plymouth, Devon
PL1 3JY

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