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Download the complete specification and technical data sheet (1.2 Mo)

AUTOMATIC SWITCHOVER system

High performance analytical instruments require high purity gas supplies. Our ultra high purity switchover system and valves series are especially designed for trace impurities analytical devices.

The LDASS (automatic switchover system) series is specially designed to provide continuous gas flow from two high pressure sources. They are complete high purity changeover system which combines the changeover regulator and a line regulator into a compact wall mount system for ultra high purity and specialty gases.

Diffusion-resistant metal diaphragm seal ensures gas purity and integrity. Mounting bracket is standard and internal parts are stainless steel 316L and suitable for cylinder gas, bulk gasline, mixed gas or any other type of gaseous mixtures.

THE LDASS SPECIFICATION

PORTS

  • 1⁄4 FNPT

LEAK RATE CERTIFICATION

  • 2 x 10-8 atm cc/sec Helium
BODY MATERIAL
  • Stainless Steel 316L

DIAPHRAGM

  • Stainless Steel 316L
MAIN VALVE
  • Stainless Steel 316L
VALVE SPRING
  • Stainless Steel 316L
VALVE SEAT
  • Teflon
MAX INLET PRESSURE
  • 3500psig (238bar)
MAX OUTLET PRESSURE
  • 145psig (10bar)
OPERATING TEMPERATURE
  • -40°C to +70°C (-40°F-+158°F)
FLOW CAPACITY
  • Cv 0.06
FLEXIBLE HOSES
  • Come with 2 x one-meter Brained Stainless Steel with CGA580 ends with lok-filters and check valves*
  • *The end lok-filters avoid the flexible hose the get contaminated with particles and air when changing for a new filled bottle. a safety additional check valve is mounted on the flexible hose to avoid back flow from the full bottle.

OPTIONAL
  • Pressure monitoring system (LDPMS) **
  • **One pressure sensor mounted on each side of the switchover system, then when one bottle get below the accepted pressure limit, an alarm output is activated.

THE LDASS ORDERING INFORMATIONS

 

LDASS Series

  • Standard inlet pressure up to 3500 psig (238 bar)
S Body material
  • S: Stainless steel 316L
010 Max outlet pressure
  • 010: 1-10 bar (1-145 psig)
NP4 In/Out ports size
  • NP4: 1⁄4 FNPT
S Flow capacity
  • S: CV 0.06
580 CGA type  580: CGA580 ends mounted on the flexible hoses
1 Hose length 1: 1 METER
LDPMS Options  LDPMS: Low pressure monitoring system with alarm module with 2 pressure sensors/lcd

LDASS Application Notes