ESAB ISG 43D RH-II SS Gas Regulator – 2 Gauge, 250 Bar

The ESAB ISG 43D RH-II SS Gas Regulator is a high-performance two-stage specialty gas regulator designed for applications requiring precise and consistent pressure control. It forms part of the ESAB ISG 43 series, which is designed for specialty gases up to grade 5.5 purity and applications where stable delivery pressure is required as cylinder pressure decreases.

The regulator features a stainless steel 316 body and bonnet, a Tefzel seat and a Teflon-lined SS316L diaphragm. ESAB also specifies helium leak testing to help ensure suitability for high-purity gas applications and reduce the risk of contamination by diffusion.

ESAB ISG 43D RH-II SS Gas Regulator for Specialty Gases

The ESAB ISG 43D RH-II SS Gas Regulator is designed for primary pressure control of specialty gases. Its two-stage pressure reduction design helps provide more consistent delivery pressure as the gas cylinder pressure falls.

This makes the regulator suitable for applications where stable pressure control is more important than simple general-purpose gas regulation. Typical environments can include laboratories, research and development facilities, analytical applications and industrial processes requiring controlled specialty-gas delivery.

Two-Stage Pressure Regulation

Unlike a conventional single-stage regulator, the ESAB ISG 43D RH-II SS uses a two-stage pressure reduction arrangement.

The two-stage design provides controlled pressure reduction from the high-pressure gas cylinder to the required delivery pressure. This configuration is particularly useful where a stable outlet pressure is required throughout the cylinder’s pressure range.

For the RH-II version, ESAB specifies a delivery pressure range of 0.8–15 bar and a maximum flow rate of 150 L/min.

Stainless Steel 316 Construction

The ESAB ISG 43D RH-II SS Gas Regulator uses stainless steel 316 for the body and bonnet. This construction provides high strength and corrosion resistance and is appropriate for demanding specialty-gas applications.

The internal sealing system includes a Tefzel seat and Teflon-lined SS316L diaphragm. These materials are designed to support reliable pressure regulation while helping maintain gas purity.

High-Pressure 250 Bar Inlet

The regulator is specified for a maximum inlet pressure of 250 bar. The inlet pressure gauge has a range of 280 kg/cm², while the outlet gauge has a range of 25 kg/cm² according to ESAB’s technical literature.

The maximum delivery pressure for the RH-II configuration is 15 bar, with an adjustable delivery range of 0.8–15 bar.

150 LPM Maximum Flow

The ESAB ISG 43D RH-II SS provides a maximum flow rate of 150 L/min.

The actual operating flow should be selected according to the gas, downstream equipment and process requirements. Users should not exceed the manufacturer’s specified pressure and flow limits.

Helium Leak Tested

One of the important features of the ESAB ISG 43D RH-II SS Gas Regulator is helium leak testing.

ESAB states that the ISG 43 series regulators are subjected to helium leak testing to help ensure non-contamination by diffusion. This feature is particularly relevant for high-purity and specialty-gas applications where gas integrity and contamination control are important.

Connections

The regulator uses a 5/8″ BSP right-hand male inlet connection and a 1/4″ compression fitting outlet.

Before installation, verify that the cylinder valve, gas tubing and downstream equipment use compatible connections. Do not modify fittings or force incompatible connections.

Laboratory and Industrial Applications

The ESAB ISG 43D RH-II SS Gas Regulator can be considered for applications including:

• Laboratory gas systems
• Research and development facilities
• Specialty gas distribution
• Analytical equipment
• Industrial process gas control
• High-purity gas applications
• Gas testing and instrumentation
• Controlled gas supply systems

The ESAB ISG 43 series is designed for specialty gases up to grade 5.5 purity, subject to the correct gas configuration and application requirements.

Why Choose the ESAB ISG 43D RH-II SS?

The ESAB ISG 43D RH-II SS Gas Regulator combines two-stage pressure regulation with stainless steel construction and helium leak testing. Its 250 bar maximum inlet pressure, 0.8–15 bar delivery range and 150 L/min maximum flow make it suitable for demanding specialty-gas pressure-control applications.

The RH-II configuration is identified by ESAB product number 1340443114. It is important to select the correct RH/LH connection and pressure-range variant for the gas cylinder and application.

Buy ESAB ISG 43D RH-II SS Gas Regulator

If you require an ESAB ISG 43D RH-II SS Gas Regulator for laboratory, R&D or industrial specialty-gas applications, verify the required gas service, cylinder connection, outlet connection, pressure range and flow requirements before ordering.

For bulk procurement and industrial requirements, contact Technosteer Online for availability and quotation.