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Premier Control Technologies Flow, pressure, level and temperature solutions

Drastar DRA200 Series

  • Tied-diaphragm design for positive shut-off
  • Surfaces finishes to B.A. 25Ra, E.P. 10 Ra or E.P. 5 Ra microinch
  • Threadless options

Tied-diaphragm Low Pressure Reducing Regulator

DRA200 series from Drastar is a single stage low pressure reducing regulator for high purity applications. It features a tied-diaphragm design for positive shut-off and protects the diaphragm from rupture. Surfaces finishes available are to B.A. 25Ra, E.P. 10 Ra or E.P. 5 Ra microinch.

Body, Diaphragm and Seat materials

The body is all 316L stainless steel with options available offering various Ra finishes.

Diaphragm material is also 316L stainless steel as standard with the option of Hastelloy-C, the diaphragm is non-tied.

Seat materials available are PCTFE, Teflon or Vespel.

Inlet and Outlet pressures

Two inlet pressure are available to allow for a maximum inlet pressure of either 42 bar or 210 bar (600, 3000 PSI).

The outlet pressure range can be controlled to:

  • 0.1 - 1.7 bar (1 - 25 PSI)
  • 0.1 - 3.5 bar (1 - 50 PSI)
  • 0.1 - 7 bar (1 - 100 PSI)
  • 0.2 - 17 bar (1 - 250 PSI)

Connections available are 1/4”, 3/8”, 1/2”, and 3/4” VCR type with varying Cv values for low to high flow rates.

Threadless connections are also available offering enhanced particle prevention by adopting a locking-plate seal system.

Drastar’s patented “push and lock type handle” allows easy and stable operation of the low pressure, high flow pressure reducing regulator. “Locking” the pressure is easily done by pushing down the handle and this will prevent any slight change of the pre-set pressure value, typically from vibration on the gas line or ambient changes. Unlocking by pulling back the handle allows the user to make adjustments to the pressure set point.

Drastar’s regulators are oil-free, with all pressure regulators being assembled, cleaned, inspected, and packed in clean-rooms equipped with clean bench, helium detector, particle counter, ultrasonic cleaner, ultrapure water system, vacuum packaging machine.

Key specifications

TypeUHP, Tied Diaphragm - Pressure Reducing Regulator
Maximum Inlet Pressure3000 psi (210 Bar)
Maximum Outlet Pressure250 psi (17 Bar)
Cv Options0.06, 0.2
0.5, 1.0, 1.2
Sensing TypeTied Diaphragm
Port Sizes1/4", 3/8", 1/2", 3/4"
Port TypeVCR
ApplicationCorrosive Gas


Common process applications and industrial uses include:

  • Toxic gases
  • Pyrophoric gases
  • Highly corrosive gases

Other features

  • Cv values available of 0.06, 0.2, 0.5, 1.0 or 1.2
  • Standard temperature to 60C with PCTFE, 70C with Teflon option or 170C with Vespel option
  • Design proof pressure to 150% of maximum rating
  • Panel mounting nut available as an option

Model numbers

  • DRA200-A100S-xxx-4MS-GxS
  • DRA200-A100S-xxx-4FS-GxS
  • DRA200-A100S-xxx-8MS-GxS
  • DRA200-A100S-xxx-8FS-GxS
  • DRA200-A100S-xxx-2MS-GxS
  • DRA200-A100S-xxx-2FS-GxS
  • DRA200-A100S-xxx-3MS-GxS
  • DRA200-A100S-xxx-3FS-GxS
  • DRA200-A100x-xxx-xxS-GxS
  • DRA200-B100x-xxx-xxS-GxS
  • DRA200-C100x-xxx-xxS-GxS 316L
  • DRA200-D100x-xxx-xxS-GxS 316L
  • DRA200-E100x-xxx-xxS-GxS 316L


The Drastar DRA200 Series is widely used in the following industries:

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