Directional spool valves, direct operated, with hydraulic actuation LS 1377

Description

• Size 16
• Component series 1X
• Maximum operating pressure 250 bar
• Maximum flow 250 l/min

Features

• 6/2 directional design
• For subplate mounting
• Spool position monitoring, optional

Product description

Valve type LS 1377 is a directional spool valve with hydraulic actuation. It controls the start, stop and direction of a flow.

The directional valves basically consist of the main valve with housing (1), the main control spool (2) and a return spring (3).

The spring chamber (4) is depressurized and connected to port L. This is to prevent back pressure in the spring chamber (4) from building up due to internal leakage.

The cover chamber (5) is connected to port Y.

With pilot pressure loading of the front side of the main control spool (2) in the cover chamber (5) via port Y, the spool is moved to the spool position. In the valve, the required ports are connected in this way.

If the loaded control spool area is depressurized, the return spring (3) in the spring chamber (4) causes the valve to return to its initial position.

Type code

Technical data

(For applications outside these values, please consult us!)

general

hydraulic

Notice:

Switching times may vary dependent on operating time, hydraulic fluid temperature and application conditions.

Diagrams/characteristic curves

(measured with HLP46, ϑOil = 40 ±5 °C)

Δp-qV characteristic curves

A2→T, A1→A2, P→B2, B1→B2

Symbols/Circuit diagrams

Dimensions

Dimensions in mm

Required surface quality of the valve contact surface

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

Valve mounting screws (separate order)

Extended functions and versions

Inductive position switch type QM

With on/off valves, contactless position switches with integrated switching amplifiers are switched after reaching of the spool position to be monitored. The spool position reached is displayed by a binary signal.

Advantages of the position switches:

• Short-circuit-proof

• Available with M12 x 1 plug-in connection

• Direct monitoring of the spool position at the control spool

• Long life cycle

• High reliability due to no use of dynamic seals

• Reaction time of the switch upon operation approx. 15 ms

Notices:

Valves with inductive position switches in safety-relevant controls may only be assembled and commissioned by hydraulically and electrically trained specialists. Adjustment and maintenance work requires special tools and devices. This work may only be performed by authorized specialists or in the factory.
Improper work at safety equipment leads to a risk of personal injury and damage to property.

• The essential valve components are coordinated with each other in the production plant and adjusted during assembly. They must not be interchanged. In case of valve or position switch defects, the complete valve must be exchanged.

• The factory setting of the position switch must not be changed. The position switch may only be set by the valve manufacturer.

• The position switch must be automatically monitored by the machine control to prevent initiation of a new machine cycle even in case of a failure of the position switch.

• The machine control and the selected components are to be designed so that the leakage cannot lead to an inadmissible closing movement.

• Position switches have an attenuating effect, i.e. the switching times specified in the basic data sheets of the valves may be increased.

• The switching times according to ISO 6403 specified in the respective valve data sheets do not correspond to the reaction times of the position switch (time between signal change at the solenoid and the signal change of the position switch). Temporal query mechanisms should be set at least to 80 … 100 ms.

Electrical connection

Connection voltage	24 V +30 %/-15 %, direct voltage
Admissible residual ripple	≤10 %
Load capacity	maximum 400 mA
Switching outputs	PNP transistor outputs, load between switching outputs and GND
Pinout	1	+24 V
	2	Switching output: 400 mA
	3	0 V, GND
	4	Switching output: 400 mA

Notice:

The electricity is connected via a 4-pole mating connector (separate order, see "Accessories) with connection thread M12 x 1.

Switching logics

Depending on the spool position to be monitored, the switching outputs have the following function:

Version QMA

Position switch on side B, monitored spool position of the main stage "a"

Version QMB

Position switch on side A, monitored spool position of the main stage "b"

version QMAB

Position switch on side A and B, monitored spool position "a" and "b"

0	Contacts open (0 V)
1	Contacts closed (24 V)
	Overlap area / hydraulic symbol change
①	Rest position
②	Solenoid "a" is switched
③	Solenoid "b" is switched

Dimensions

Dimensions in mm

Notices:

• The dimensions are nominal dimensions which are subject to tolerances.

• Mating connectors, separate order, see "Accessories"

Accessories

Mating connectors for sensors and valves with connector “K24”, “K35” and “K72”, M12 x 1

4P Z24

Mating connectors for sensors and valves with connector “K24”, “K35” and “K72”, M12 x 1

4P Z24

• For sensors and valves with connector “K24”, “K35” and “K72”
• Mating connectors M12, 4-pole, line cross-section 0.75 mm2

• Data sheet

• Spare parts and repair

Mating connectors for sensors and valves with connector “K24”, “K35” and “K72”, M12 x 1, with assembled connection line

4P Z24 +

Mating connectors for sensors and valves with connector “K24”, “K35” and “K72”, M12 x 1, with assembled connection line

4P Z24 +

• For sensors and valves with connector “K24”, “K35” and “K72”
• Mating connectors M12, 4-pole, line cross-section 0.75 mm2

• Data sheet

• Spare parts and repair

Ordering codes

Downloads

Directional spool valves, direct operated, with hydraulic actuation Data Sheet | RE24782 | 2019-07-01 | English | PDF | 340k Product Groups: Pilot operated Type LS 1377