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AO

Product catalog summary

4-Way Directional Control Valve Overview:
The AO series 4-way directional control valve is designed for durability and dependability, featuring a manually shifted handle for metered flow in either direction. The valve is compact, with positive metering and a precision-ground IOSSO plated spool for long life. Optional O-ring ports are available to eliminate leakage.

Specifications:

Flow Rate: 0-18 gpm (0-68.1 lpm)
Pressure Rating: 3000 psi (207 bar)
Weight: 5-1/2 lbs. (2.5 kg)
Port Sizes: 3/4” NPT Inlet/Outlet, 1/2” NPT Work Ports; #12SAE Inlet/Outlet, #10SAE Work Ports
Filtration: 30-Micron recommended

Materials:

Body: Cast Iron
O’Rings: Buna N
Spool: IOSSO Plated Steel

Spool Types:

Tandem Center (T)
Open Center (O)
Fine Metering (M)
Tandem Metering (TM)
Closed Center (C)
Tandem 3-Way (T3)

Actuators:

Standard Enclosed Lever Handle (G)
Enclosed Lever Handle (C)
Lever Handle (L, J)
Pilot Operated (P)
Rotary Handle (H)

Spool Action:

Three-position Detent (D)
Friction Detent (F1)
Spring Center (S)
Spring Center Detent (SD)
Spring Offset (SO, SO2)
Rotary Friction Detent (E)
Adjustable Relief (R)

Model Code Examples:

AO755T4GRS: 3/4” inlet/outlet ports, tandem center 4-way spool, G style handle, adjustable relief at 1500 psi, spring centering.
AO755O4GD: 3/4” inlet/outlet ports, open center 4-way spool, G style handle, three-position detent.

Options and Accessories:

Three-position Detent Kit (SDC-D)
Ball Friction Detent (SDC-F1)
Spring Centering Kit (SDC-S)
Spring Offset Kit (SDC-SO, SDC-SO2)
Handle Kits (SDC-HG, SDC-HJ, SDC-HL)
Seal Kit for AO (SDC-K)

Performance Graphs:

Pressure vs. Flow for AO Relief: Shows pressure settings at various flow rates.
Pressure Drop vs. Flow: Illustrates pressure drop across the valve at different flow rates.

Dimensional Data:
Provides detailed measurements for installation and integration into systems.

Catalog excerpts

4 - WAY DIRECTIONAL CONTROL VALVE • SMALL AND COMPACT to fit your design requirements. • POSITIVE METERING in either direction with the manually shifting handle. • PRECISION GROUND Iosso PLATED SPOOL that assures long life. • OPTIONAL O'RING PORTS to eliminate leakage. • Std. Port sizes (Consult factory for others). work ports. • 30 - Micron filtration recommended. • Cast Iron Body • IOSSO Plated Steel Spool • Consult Factory for Stainless Steel Spools • Black Nylon Ball Knob

Open the catalog to page 1

4-way Directional Control AO – CREATING A MODEL CODE FOR AO’S: A O __ __ __ __ __ __ __ __ PORT SIZE: 755 – 3/4” inlet/outlet and 1/2” work ports 120 – #12SAE inlet/outlet and #10SAE work ports SPOOL ACTION: S – Spring center D – Three-position detent F1 – Ball friction detent WC – Norm. close elec. switch (use for S, D and F1) WO – Norm. open elec. switch (use for S, D and F1) SO – Spring offset (P to B and neutral) SO2 – Spring offset (P to B, neutral and P to A) SD – Spring center / detent SF1 – Spring center / friction detent (P to B in friction detent) 2D – Two-position detent P to B D2...

Open the catalog to page 3

4-way Directional Control SPOOL SCHEMATICS: A A B B P T Tandem Center (T) - Powers cylinder or motor in both directions. Pump unloads to tank when spool is in neutral. Cylinder or motor blocked when spool in neutral. A B P T Open Center (O) - All of the ports are connected to tank when the spool is in neutral. Allows cylinder to move or motor to rotate when spool is in neutral. A B P T Fine Metering Spool (M) - Requires external locking valves to hold cylinder when spool is in neutral position. Extremely fine metering control. This spool requires a pressure compensated pump. P T Closed Center...

Open the catalog to page 4

AO

AO

Catalog excerpts

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