Parker Hydraulic Group
Pulse-Tone™ Inline Shock Suppressors

The Inline Pulse-Tone Hydraulic Shock Suppressor reduces pump pulsations and shock. When you stop pulsation and vibration, you stop the cause of component wear and leakage. A power unit with an Inline Pulse-Tone installed can operate at higher RPM with smaller, less expensive components...and less noise.  

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Models

  • 3000 psi rated for oil applications
  • 3000 psi Stainless Steel for water and chemical applications
  • 5000 psi for high pressure oil applications

Port Connections

Four types of hydraulic line connections are available:

  • NPT pipe connections from 3/8” to 2” pipe
  • BSPP connections from 3/8” to 2” pipe
  • SAE port connection from 3/8” to 2” tubing
  • Split flange connection from 3/4” to 3”

Inline Pulse-Tone units can be ordered with any combination of ends, such as a split flange one end and a straight thread on the opposite end. When ordering, specify the type of connection for each end. 

Bladder Materials

  • Standard material is high temperature HNBR, -50° to 300°F (-45° to 149°C)
  • Fluorocarbon or EPR bladders are available for special applications

Precharge

The unit can be shipped with a nitrogen precharge equal to 50% of hydraulic system pressure. Check precharge every three months to maintain maximum efficiency. (See page 184 for procedures.)

Mounting

The Pulse-Tone may be mounted in any position, horizontal or vertical. Since there are no moving parts, either end may be used for inlet or outlet.  Split flange mounting makes it possible to break an existing connection to add the Pulse-Tone between the flanges.