Orifice plate with RF sealing face

  • For mounting between measuring flanges (ASME 16.36, 16.5, 16.47 A)
  • Size: ½…24"; up to ASME Cl 2500
  • Temperature: up to +450°C / +842°F
  • Material: 1.4404 / 316L



The OPTIBAR OP 1100 is an orifice plate (OP) with raised face (RF) design. It is a simple and cost-effective DP flow element for basic applications with clean liquids, gases and low velocity steam flows. The primary element is particularly suitable for use at uncritical pressure and temperature conditions (up to +450°C / +842°F; max. ASME Cl 2500).

Plate and handle of the OPTIBAR OP 1100 are a one-piece seamless construction. The RF orifice plate is sealed with a flat gasket. The raised face has a serrated texture to increase the gripping and retaining force. This kind of orifice plate is used with orifice flange unions and placed between standard ASME flanges with pressure taps (ASME 16.36, ASME 16.5). The OPTIBAR OP 1100 is available with a sharp edge on the upstream side and 45° edge on the downstream side or with bi-directional cross-section profile.

Product highlights

  • Cost-effective DP flow element according to EN ISO 5167
  • Sizing: EN ISO 5167, ASME MFC-3M, AGA 3, ASME PTC 19.5 2004, GOST 8.586, RD 50-411-83
  • Easy handling and simple installation
  • Lowest uncertainty of discharge coefficient (<±0.5%)
  • High Reynolds number permissible according to norm
  • With optional vent drain holes

Typical applications

  • For differential pressure flow measurement with OPTIBAR DP 7060 transmitter
  • For applications with clean liquids, gases and steam flows at uncritical pressure conditions

Related products

Compact orifice plate flowmeter

Integral DP flowmeter for liquids, gases and steam

  • Fast and easy installation without additional engineering, impulse lines and supports
  • Up to +400°C / +752°F; max. 160 bar / 2320 psi (line pressure)
  • Line size: DN50…600 / 2…24"
  • 2-wire 4…20 mA/HART®, FF, Profibus-PA

View product details

Integral orifice meter run assembly

DP flowmeter for process applications with small line sizes (down to DN15 / ½")

  • Standardised calibrated meter run assembly, designed acc. to ISO 5167 or ISO TR 15377
  • Up to +400°C / +752°F; max. 160 bar / 2320 psi (line pressure)
  • Flange: DN15…100 / ½...4"
  • 2-wire, 4…20 mA/HART®, FF, Profibus-PA

View product details


Differential pressure transmitter for flow, level, differential pressure, density and interface measurements

  • High performance DP transmitter with integrated line pressure measurement
  • Measuring range: 30 mbar…16bar / 0.44…232 psi; Line pressure: up to 400 bar / 5800 psi
  • Reference accuracy of ±0.065%
  • 2-wire, 4…20 mA/HART®, FF, Profibus-PA, Bluetooth®

View product details