55A66 SERIES

COUNTERBALANCE VALVE

CARTRIDGE • A6610 CAVITY, INT. VENTED

Description

A CARTRIDGE STYLE, THREE PORT, PILOT TO OPEN COUNTERBALANCE VALVE WITH AN INTERNALLY VENTED SPRING CHAMBER AND FREE REVERSE FLOW CHECK, INTENDED FOR MOTION CONTROL AND OVER-CENTER LOAD HOLDING APPLICATIONS.

Product Rendering

Schematic

Typical Performance

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Operation

  • BACK PRESSURE AT PORT (2) IS ADDITIVE TO RELIEF SETTING.
  • FLOW FROM (1) TO (2) IS BLOCKED UNTIL THE RELIEF PRESSURE SETTING HAS BEEN EXCEEDED.
  • FLOW FROM (1) TO (2) IS BLOCKED UNTIL A PILOT PRESSURE INVERSELY PROPORTIONAL TO THE LOAD PRESSURE IS APPLIED TO THE PILOT PORT.
  • FLOW FROM (2) TO (1) IS ALLOWED WITH A STANDARD CRACK PRESSURE OF 25 PSI.

Features

  • PILOT RATIOS UP TO 10:1 AVAILABLE (HIGHER PILOT RATIOS MAY REDUCE FLOW CAPACITY)
  • LOW RELIEF HYSTERESIS.
  • QUIET, STABLE OPERATION.
  • SEALED PILOT PISTON, LOW INTERNAL LEAKAGE.
  • ADJUSTABLE WITH LOCKING NUT.
  • CLOCKWISE ADJUSTMENT TO INCREASE RELIEF SETTING.

Specifications

INTERNAL LEAKAGE 5 DROPS/MIN. MAX.
OPERATING PRESSURE 5000 PSI
RELIEF TOLERANCE +/- 10%
STANDARD CRACK PRESSURE 25 PSI
TEMPERATURE RANGE 250°F TO -40°F

Ordering Information

MODELTHREADFLOW CAPACITYCAVITYL1L2 (MAX.)HEXABTORQUE
55A66M20 X 1.512 GPMA66101.542.101.000.6260.68625 ft-lbs

MODEL

THREAD

FLOW CAPACITY

CAVITY

L1

L2 (MAX.)

HEX

A

B

TORQUE

55A66View More

M20 X 1.5

12 GPM

A6610

1.54

2.10

1.00

0.626

0.686

25 ft-lbs

This document, as well as all catalogs, price lists and information provided by Vonberg Valve, Inc., is intended to provide product information for further consideration by users having substantial technical expertise due to the variety of operating conditions and applications for these valves, the user, through its own analysis, testing and evaluation, is solely responsible for making the final selection of the products and ensuring that all safety, warning and performance requirements of the application or use are met.

The valves described herein, including without limitation, all component features, specifications, designs, pricing and availability, are subject to change at any time at the sole discretion of vonberg valve, inc. without prior notification.