56T SERIES

COUNTERBALANCE VALVE

CARTRIDGE • T SERIES CAVITY, ATMOSPHERICALLY VENTED

Description

A CARTRIDGE STYLE, THREE PORT, PILOT TO OPEN COUNTERBALANCE VALVE WITH AN ATMOSPHERICALLY 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) DOES NOT AFFECT RELIEF SETTING.
  • 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.
  • FLOW FROM (1) TO (2) IS BLOCKED UNTIL THE RELIEF PRESSURE SETTING HAS BEEN EXCEEDED.

Features

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

Specifications

INTERNAL LEAKAGE 5 DROPS/MIN. MAX.
OPERATING PRESSURE 5000 PSI
RELIEF SETTING RANGE 500 - 5000 PSI
RELIEF TOLERANCE +/- 10%
STANDARD CRACK PRESSURE 25 PSI
TEMPERATURE RANGE 250°F TO -40°F

Ordering Information

MODELTHREADFLOW CAPACITYCAVITYL1L2 (MAX.)HEXABCSD (MAX.)TORQUE
56T11M20 X 1.515.0 GPMT-11A1.382.450.9380.683 /
0.685		0.807 /
0.809		0.855 /
0.857		0.85030 ft-lbs
56T21-1430.0 GPMT-2A1.382.751.1250.871 /
0.873		1.027 /
1.029		1.074 /
1.076		0.87045 ft-lbs

MODEL

THREAD

FLOW CAPACITY

CAVITY

L1

L2 (MAX.)

HEX

A

B

C

SD (MAX.)

TORQUE

MODEL

THREAD

FLOW CAPACITY

CAVITY

L1

L2 (MAX.)

HEX

A

B

C

SD (MAX.)

TORQUE

56T11View More

M20 X 1.5

15.0 GPM

T-11A

1.38

2.45

0.938

0.683 / 0.685

0.807 / 0.809

0.855 / 0.857

0.850

30 ft-lbs

56T2View More

1-14

30.0 GPM

T-2A

1.38

2.75

1.125

0.871 / 0.873

1.027 / 1.029

1.074 / 1.076

0.870

45 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.