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Model L81 Flange Mount Pneumatic Level Switch

Brand: K-Dyne, Inc

This version of the K-Dyne, Inc. Model L81 liquid level switch incorporates a pneumatic 3-way valve, providing positive and fast system response. Its design has non-adjustable trip point and narrow level operation range making it perfect for applications where trip point tampering is unacceptable. An internal stainless steel supply gas filter reduces maintenance requirements.
Features
  • Excellent for dirty fluid applications: The design has no deep cavities or recesses exposed to process fluids
  • No external adjustments: The design minimizes the set point tampering on high or low level alarms
  • Isolated pivot: Patented internal pivot seal design provides efficient mechanism to transmit liquid buoyancy
  • Reversible switch action: Mode of operation (high or low) may be changed without switch recalibration

Specifications

Brand

Ambient Temperature Range

  • -29° to 82° C (-20° to 180° F)

Ball Material

  • Tungsten Carbide

Cap Material

  • Spring Cap: 316 Stainless Steel

Cone Material

  • 630 (17-4 PH) Stainless Steel

Enclosure, Body Material

  • 316 Stainless Steel

Flange Size - 2” (DN 50)

  • 2” (DN 50) - Unrated

Fluid Specific Gravity

  • Minimum: 0.6

NACE & NIST

  • NACE

Nut & Bolt Material

  • Hex Nut: 316 Stainless Steel

O-Ring Material

  • Seat & Valve Body: Fluorocarbon
  • Valve Stem: Fluorosilicone

Operating Pressure

  • Maximum

Pressure Range

  • Maximum

Process Connection Style

  • 2” or Larger

Process Temperature

  • Maximum

Screw Material

  • Set Screw: 18-8 Stainless Steel
  • Socket Cap: 316 Stainless Steel

Seal Retainer

  • 316 Stainless Steel

Seat / Seal Material

  • Body Seal: Fluorocarbon (FKM)
  • Seat: 316 Stainless Steel

Spring Material

  • Inconel X-750
  • Valve Stem: 316 Stainless Steel

Supply Pressure - Maximum

  • psi: 35 (kPa: 241, bar: 2.4)

Valve Type

  • 3-Way Block & Bleed Valve
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