Type 2731 Pneumatically Operated 2-Way Diaphragm Control Valve

Brand: Burkert Fluid Control Systems
Does not ship to Virginia, United States

The externally controlled diaphragm valve type 2731 consists of a pneumatically operated piston actuator, a bult-in positioner,a diaphragm and a 2-way valve housing.

The proven and robust actuator with plastic housing ensures use under hygienic or aggressive environmental conditions. The flow-efficient valve housing with little dead space enable high flow rates and a wide range of possible uses. The valve housing and the diaphragm are available in all common materials and designs.

The actuator has a compact, autoclavable design (PPS version). The integration of automation units Top Control 8692/8693/8694 Side Control 8635/8792/8793 is possible in all expansion stages (can be retrofitted). An explosion-proof ATEX / IECEx device variant is available.

The add-on housing is optionally available in plastic or stainless steel. The actuator is equipped with an integrated, optical position indicator as standard, optionally a min./max. stroke limitation can be installed.
  • Valve housing and diaphragm available in various materials and designs
  • Surfaces in contact with the product from Ra ≤ 0.38 µm...1.6 µm (optionally electropolished)
  • Available in all common connection sizes and variants


Certifications & Approvals

  • ATEX / IECEx
  • FDA
  • USP
  • 3A

Diaphragm Material

  • EPDM (AD), PTFE/EPDM (EA), Advanced PTFE/EPDM (EU), Gylon/EPDM Laminated (ER)

Diaphragm Size

  • 65 mm, 80 mm, 100 mm

Actuator Material

  • PA

Body Material

  • Forged Body (VS): Forged 316L Stainless Steel/1.4435/BN2, Fe < 0.5 %/C ≤ 0.03 %
  • Tube Valve Body (VP): 316L Stainless Steel/1.4435/BN2
  • Cast Body (VG): Cast 316L Stainless Steel/1.4435
  • Plastic Body (PV, PP, PD): PVC (PVC-U), PP, PVDF

Pilot Pressure

  • Maximum 6 bar


  • Neutral Gases and Fluids, Highly Purified, Sterile, Aggressive or Abrasive Medium

Medium Temperature

  • -10° to 143° C

Ambient Temperature

  • -10° to 50° C

Port Connection

  • Welded, Clamp, Loose Flange, Fixed Flange

Nominal Diameter

  • DN 65 - 100 (2-1/2” to 4”)

show more