B210 / B220 / SL210 / SL220 series semi-automatic system is designed for a continuous supply of high purity and corrosive gases. It consists of a primary bank and a reserve bank of cylinders. Because of the differential pressure between the primary and reserve banks, the changeover takes place automatically when the primary bank is depleted to provide a continuous supply of gas from the reserve bank. In order to activate the next switchover, the regulators on both banks need to be readjusted upon changing the cylinders. Stable pressure output is provided by the second pressure regulator on the main line.

FEATURES

• SL210 series manifold system uses R21SL regulator and B210 series uses R21B regulator
• SL220 series manifold system uses R22SL regulator and B220 series uses R22B regulator
• Metal-to-Metal diaphragm seals
• Pressure adjustment handle on regulator
• Gland check valves on pigtails
• Rear bracket mount

TYPICAL APPLICATIONS 

• Research laboratories
• Gas and liquid chromatography
• Laser gas systems
• Purging system
• Zero & calibration gases
• Hydrocarbon services
• Leak testing

SPECIFICATIONS: 

• Maximum Inlet pressure: 3000psig
• Working temperature: -40 oF ~ 140 oF(-40 oC ~ 60 oC)
• Pipe: 1/2” seamless stainless steel(BA grade)
• Flow rate: see flow data chart
• Regulator leak rate: 2 X 10-9 atm cc/sec He

21 REGULATOR MATERIALS: 

• Body: 316L, Chrome-plated brass
• Diaphragm, filter: 316L
• Bonnet: 304, Chrome-plated brass
• Seat: PCTFE
• Stem: 316L
• Spring: 316

R22 REGULATOR MATERIALS: 

• Body: 316L, Chrome-plated brass
• Diaphragm, filter: 316L
• Bonnet: Chrome-plated brass
• Seat: PCTFE
• Stem: 316L
• Spring: 316

OPTIONAL COMPONENTS: 

• Diaphragm valve
• Needle valve
• Filter
• Flash back arrestor
• Pigtails
• Pressure alarm

Note: Check valve must be added to the inlet of the chang=over dence, presenting gas leackage during cylinder chafe.