AO755 Series 1-Spool Monoblock Valve, 4-way 3-position, Tandem Center Detented Spool

Description & Features

The AO755 Series 1-Spool Monoblock Valve 4-way 3-position Tandem Center Detented Spool is a robust and precise hydraulic component designed for effective metering in industrial applications.

This valve ensures positive metering in either direction with port flow directly proportional to lever movement. Its cast iron body chrome-plated steel spool and Buna-N O-rings offer durable performance under maximum operating pressures of up to 3000 PSI.

Engineered for efficiency the valve features small and compact construction complemented by a precision ground chrome plated spool for extended lifespan. The 3/4NPT Inlet & Outlet and 1/2NPT work ports make it compatible with various hydraulic systems.

Designed by Brand Hydraulics Inc. this monoblock valve operates with a tandem center detented spool action and has a flow rating of 18 GPM. The tank port must return directly to the tank ensuring optimal manual operation of metered flow to work ports.

For optimal performance a 30 Micron filtration is recommended.

Supplier Part Number: AO755T4LD

Specifications

Brand
Brand Hydraulics
Actuator Type
Lever
Body Material
Iron
Circuit Type
Tandem Center
Color
Black
Configuration
Tandem Center Spool
Connection Type
NPT
Dimensions
11 in L x 3.94 in W x 8.8 in H
grp Recommended Filtration
30 um
Handle Material
Nylon
Key
F
Number of Handles
1
Number of Ports/Ways
4
Number of Positions
3
Product Model
Mono-Block
Seal Material
Buna-N
Series
AO Series
Softgoods Material
Buna-N
Spool Action
Detented

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Product Questions & Answers (1)

Question by: Neal S on Dec 24, 2025, 8:21 PM
got a cylinder that needs to stay put when i let go of the handle. is this spool the detent kind or does it spring back?
Answer by: Customer Support on Dec 26, 2025, 6:23 AM
It uses a detented spool, so the lever can stay in the selected position instead of spring-returning to center.

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