Features:
  • Very low deadband between the operation of the supply valve and exhaust valve.
  • High capacity exhaust valve provides efficient dynamic reverse flow.
  • Large area diaphragms provide high accuracy, sensitivity and excellent low pressure performance.
  • Soft seat supply and exhaust valves provide efficient leak free operation.
  • Pressure balanced supply valve prevents changes in control characteristics.
  • Damped diaphragm control chamber provides stable operation and protects valves from damaging oscillation under high flow conditions.
  • Two accessory ports connected to the outlet chamber.
  • Tapped exhaust port for exhaust or for incorporation of a silencer.
  • Canadian Registration Number (CRN) Certification for all territories and provinces.
The above description encapsulates the entire product series. Specifications for individual configurations may vary depending on the selection chosen.
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Selected Configuration

Model #:

Model 4900A

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Configuration

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Agency Approvals

  • CRN

Environmental Protection

  • Acceptable for use in Zones 1 and 2 for gas atmosphere; Groups IIA and IIB and Zones 21 and 22 for dust atmospheres

Supply Pressure - Maximum

  • bar: 17
  • kPa: 1,700
  • psig: 250

Supply Pressure Effect

  • psi: 0.10 (kPa: 0.7, bar: 00.7) for psi: 100 (kPa: 700, bar: 7) Change in Supply Pressure

Signal or Output Pressure - Maximum

  • psig: 150 (kPa: 1,000, bar: 10)

Ambient Temperature

  • -40° to 93.3° C (-40° to 200° F)

Exhaust Capacity - Relieving Units Only

  • 100 SCFM (170 m³/hr)

Ratio

  • 1:1

Ratio Accuracy

  • 0.5% of psi: 100 (kPa: 700, bar: 7) Output Span

Process Connection - Threaded

  • 3/4" Female NPT
  • 1" Female NPT
  • 3/4" Female BSPP
  • 3/4" Female BSPT
  • 1" Female BSPP
  • 1" Female BSPT

Flow Rate

  • 9.0 Cv

Flow Capacity

  • 500 SCFM (850 m³/hr) at psig: 100 (kPa: 700, bar: 7)

Enclosure/Body Material

  • Aluminum

Diaphragm Material

  • Nitrile on Dacron

Trim Material

  • Stainless Steel
  • Zinc-Plated Steel

Elastomers

  • FluoroCarbon
  • Nitrile