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MODEL

LODA

Vent-to-open, spring-biased closed, unbalanced poppet logic element with pilot

source from port 1

SERIES 1 / CAPACITY: 95 L/min. / CAVITY: T-11A

(X)CONTROL

X Not Adjustable

(D)CRACKING PRESSURE

D 50 psi (3,5 bar)

(N)SEAL MATERIAL

N Buna-N

V Viton

MATERIAL/COATING

Standard Material/Coating

/AP Stainless Steel, Passivated

NOTE: DATA MAY VARY BY CONFIGURATION. SEE CONFIGURATION SECTION.

These unbalanced, vent-to-open logic valves are 2-way switching elements that are spring-biased closed and have

port 1 as a pilot source. With port 3 blocked, the valve will remain in the closed position in the 1 to 2 direction and

will function as a check valve from 2 to 1. With port 3 vented, the valve will open provided there is sufficient

pressure to overcome the spring force. The force generated at port 3, plus the spring force, must be greater than

the sum of the forces acting at port 1 and port 2 for the valve to remain closed. NOTE: The pilot area (port 3) is 1.8

times the area at port 1 and 2.25 times the area at port 2.

TECHNICAL DATA

Cavity T-11A

Series 1

Capacity 95 L/min.

Maximum Operating Pressure 350 bar

Maximum Valve Leakage at 110 SUS (24 cSt) 0,7 cc/min.

Pilot Volume Displacement 0,66 cc

Area Ratio, A3 to A1 1.8:1

Area Ratio, A3 to A2 2.25:1

Control Orifice Diameter 0,53 mm

Valve Hex Size 22,2 mm

Valve Installation Torque 41 - 47 Nm

Seal kit - Cartridge Buna: 990011007

Seal kit - Cartridge Polyurethane: 990011002

Seal kit - Cartridge Viton: 990011006

Model Weight 0.12 kg.

sunhydraulics.com/model/

LODA

Model Code Example: LODAXDNCONFIGURATION OPTIONS

 2019 Sun Hydraulics 2 of 2

TECHNICAL FEATURES

These valves have positive seals between port 2 and the pilot area.

These valves open quickly when vented. Time to close is difficult to predict as it is dependent on the rate of flow and the pressure drop created as it closes.

Because these valves are unbalanced, operation is pressure dependent. Opening and closing of the poppet are functions of the force balances on three areas: Port

1 = 100%, Port 2 = 80%, and the Pilot Area = 180%.

These valves are pressure responsive at all ports, therefore it is essential to consider all aspects of system operation through a complete cycle. Pressure changes

at any one port may cause a valve to switch from a closed to an open position, or vice versa. All possible pressure changes in the complete circuit must be

considered to assure a safe, functional system design.

All ports will accept 5000 psi (350 bar).

Corrosion resistant cartridge valves are intended for use in corrosive environments and are identified by the model code suffix /AP for external stainless steel

components, or /LH for external zinc-nickel plated components. See the CONFIGURATION section for all options. For further details, please see the Materials of

Construction page located under TECH RESOURCES.

Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge

machining variations.

PERFORMANCE CURVES

RELATED MODELS

LODA8 Vent-to-open, spring-biased closed, unbalanced poppet logic element with pilot source from port 1 and integral T-8A control cavity