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MICO, Incorporated
pressure modulating brake valves, relay valves, and steering assist valves

pressure modulating brake valves, relay valves, and steering assist valves

Product catalog summary

Overview of MICO, Inc.
MICO, Inc. is a company that designs, manufactures, and markets hydraulic components, controls, and brake systems for off-road markets. It operates facilities in Minnesota, California, and Mexico and is known for custom-engineered products. The company holds ISO 9001 and ISO 14001 certifications, highlighting its commitment to quality and continuous improvement.

Product Lines
MICO offers a variety of products including actuators, brake locks, brakes, controls, cylinders, electrohydraulics, master cylinders, and valves. Their hydraulic brake valves are designed for vehicles with hydraulic power devices, eliminating the need for separate power brake units.

Hydraulic Brake Valves
These valves are recognized for their dependability, safety, and performance. They are compatible with open center, closed center, or load sensing hydraulic systems and use mineral base hydraulic oil. Available configurations include pressure modulating, relay, and steering assist valves.

Applications
MICO's valves are used in various sectors such as forestry, agriculture, heavy construction, mining, in-plant and warehouse equipment, and airport support vehicles.

Pressure Modulating Valve Catalog Code
The catalog details specifications for pressure modulating valves, including product designators, pedal pivot pin options, base types, desired pedal force ranges, maximum valve pressure settings, valve configurations, brake pressure curves, pilot port configurations, and pedal types.

Single Modulating Valves
These valves feature a closed center spool design, offering modulated output pressure up to 206.8 bar (3000 PSI). They are compact, protect return springs from contaminants, and provide smooth modulation. Various actuation types are available, with options for built-in switches and potentiometers.

Specifications and Models
The document lists models with specific brake pressure settings, input forces, and stroke measurements, emphasizing adaptability to different hydraulic systems.

Specifications
MICO Tandem Modulating Valves provide isolated pressure outputs for front and rear brakes, modulating output pressure up to 206.8 bar (3000 PSI). Standard brake pressure settings are available in increments of 3.5 bar (50 PSI).

Brake Pressure Settings
The brake pressure setting range is from 20.7 bar (300 PSI) to 206.8 bar (3000 PSI). The document lists model numbers, catalog codes, nominal brake pressure settings, tolerances, and approximate pedal forces.

Features
The valves are compact, suitable for restricted spaces, and provide independent braking to front and rear systems. They have oil-immersed spring cavities to protect return springs and ensure smooth modulation at all pressures.

Applications
Suitable for use with accumulators and a MICO Accumulator Charging Valve, these valves provide normal and emergency power-off braking in various hydraulic systems. They are available in different configurations, including valve only, push rod actuated, lever actuated, and pedal actuated, with options for built-in switches and potentiometers.

Additional Information
For more details on models and applications, consultation with the MICO Applications Department is recommended. Other MICO products include hydraulic over air relay valves, accumulator charging valves, modulating brake valves, and fluid reservoirs.

Specifications
The document outlines specifications for MICO brake valves, including pedal-actuated, tandem, and floor-mounted models. The nominal brake pressure setting ranges from 20.7 bar (300 PSI) to 206.8 bar (3000 PSI) with a tolerance of ±3.5 to ±6.9 bar (±50 to ±100 PSI).

Model Details
Various models are listed with specific catalog codes, nominal brake pressure settings, tolerances, and approximate pedal forces. Models are designed for different mounting configurations, including horizontal and vertical valves.

Description
MICO Tandem Modulating Valves with Pilot function are designed for mechanically actuated tandem modulating valves with an additional hydraulic pilot apply port, allowing on/off brake application through a hydraulic signal from a remote location.

Features
The valves are compact, provide independent braking to front and rear systems, and have oil-immersed spring cavities to protect return springs. The spool design ensures smooth modulation at all pressures, and the pilot apply function offers zero leakage and low volume actuation.

Typical Circuit Schematic
The document includes a schematic for tandem modulating valves with on/off and proportional pilot functions, highlighting the spool design.

Single Modulating Valves
These valves feature a closed center poppet design, offering modulated output pressure up to 206.8 bar (3000 PSI) with virtually zero internal leakage. They are available in various configurations and can include built-in switches and potentiometers.

Conclusion
The document provides detailed specifications and descriptions of MICO brake valves, emphasizing their versatility, compact design, and advanced features for efficient braking applications.

Description
MICO® Relay Valves are designed for modulating output pressures up to 207 bar (3000 PSI) and are adaptable to various hydraulic systems. They are used when the brake control valve is distant from the brake, utilizing pilot pressure from a remote brake valve to control modulated brake pressure.

Features
Compact size, smooth modulation at all pressures, and power-off braking through limited stored energy in accumulators.

Specifications
Maximum input pressure for all models is 206.8 bar (3000 PSI). Brake pressure setting ranges from 20.7 bar (300 PSI) to 206.8 bar (3000 PSI) in 3.5 bar (50 PSI) increments.

Hystat Brake Valve
Developed to destroke a hydrostatic transmission and apply vehicle brakes, known as inching. It is application-specific and must be carefully sized.

Park Brake Valve with Auto Apply
Provides safety by controlling the actuation of the spring apply, hydraulic release park brake. It automatically applies the brake at a predetermined declining pressure.

Dual Power Brake Valve for Steering Assist
Used for modulating output pressures up to 137.9 bar (2000 PSI), providing normal and emergency power-off braking. It can be adapted to dual pedal systems for steering assist power braking.

Linked Pedal Controls
Designed to integrate with MICO® Modulating Valves, providing independent braking to front and rear brake systems from one valve.

Useful Formulas
Includes formulas for calculating piston area, force, volume, flow rate, horsepower, and torque.

Product Line
Includes brakes, controls, cylinders, valves, and miscellaneous components such as in-line residual check valves and reservoirs.

Catalog excerpts

pressure modulating brake valves, relay valves, and steering assist valves-1

Innovative Braking and Controls Worldwide Hydraulic Brake Valves pressure modulating brake valves, relay valves, and steering assist valves Versatile, High-performance Hydraulic Brake Valves MICO Inc. MICO, I O

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pressure modulating brake valves, relay valves, and steering assist valves-3

Why choose MICO? MICO, Inc. designs, manufactures and markets hydraulic components, controls, and brake systems primarily for off-road markets. We have manufacturing facilities in: • • • North Mankato, Minnesota U.S.A. Ontario, California U.S.A. Empalme, Sonora, Mexico Many of the world’s largest off-highway OEMs value the knowledgeable staff at MICO and work with us to make their products better. Our custom-engineered products are designed with the customer requirements as the primary driver. It is our intent to help customers build their systems with our expertise in hydraulic components, braking...

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pressure modulating brake valves, relay valves, and steering assist valves-4

Forestry Equipment Agricultural Equipment Heavy Construction Equipment Swing Drive Equipment Mining Equipment In-Plant & Warehouse Equipment Airport Support Vehicles Online Revision 2012-11-06

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pressure modulating brake valves, relay valves, and steering assist valves-5

Pressure Modulating Valve Catalog Code FOR MODELS WITH PEDAL Product designator PMV = Pressure modulating valve with a pedal and base SB = Standard base and pin (no bushings in base) SS = Stainless steel pin and bushings in base PMO = Pressure modulating valve only Base Type Maximum Valve Pressure Setting NNN = None Floor Mounted Pedal FHN = Horizontal valve FHS = Horizontal valve with sensor FHW = Horizontal valve with switch FVN = Vertical valve FVS = Vertical valve with sensor FVW = Vertical valve with switch Suspended Pedal WHN = Horizontal valve WHS = Horizontal valve with sensor WHW = Horizontal...

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pressure modulating brake valves, relay valves, and steering assist valves-6

(spool design) Single Modulating Valves DESCRIPTION These MICO® Single Modulating Valves are a closed center spool design. They provide a modulated output pressure of up to 206.8 bar (3000 PSI) and a maximum input pressure of 206.8 bar (3000 PSI). Standard brake pressure settings are in increments of 3.5 bar (50 PSI). Compact size for use in restricted space When used with a properly sized accumulator and a MICO® Accumulator Charging Valve, these valves provide normal and emergency power-off braking in a variety of open-center, closed-center, and load sensing hydraulic systems. For detailed information...

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pressure modulating brake valves, relay valves, and steering assist valves-7

Roller Actuated (single) Typical Brake Valve millimeters inches SPECIFICATIONS Model Number Nominal Brake Pressure Setting Tolerance Catalog Code (refer to page 5) Approximate Input Force at Pressure Setting Brake pressure setting range all models . . . . . . . . . . . . . . . . . 20.7 bar (300 PSI) to 206.8 bar (3000 PSI) in standard 3.5 bar (50 PSI) increments Maximum input pressure all models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206.8 bar (3000 PSI) Consult MICO Applications Department for...

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pressure modulating brake valves, relay valves, and steering assist valves-8

Push Rod Actuated (single) Typical Brake Valve millimeters inches Dimensions may vary slightly by model number. SPECIFICATIONS Model Number Catalog Code Nominal Brake Pressure Setting Tolerance Approximate Push Rod Force at Pressure Setting Approximate Push Rod Stroke (no corresponding catalog code for this model number) Model Number Brake Pressure Setting Approximate Push Rod Force at Pressure Setting Approximate Push Rod Stroke * Tank port is #8 SAE o-ring port. Brake pressure setting range all models . . . . . . . . . . . . . . . . . 20.7 bar (300 PSI) to 206.8 bar (3000 PSI) in standard 3.5...

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pressure modulating brake valves, relay valves, and steering assist valves-9

Lever Actuated Typical Brake Valve millimeters inches (no corresponding catalog code for these model numbers) Brake Pressure Setting Model Number The lever rotates 120° from full-off to full-on position and held in the full-on position by a nger release mechanism. Brake pressure setting range all models . . . . . . . . . . . . . . . . . 20.7 bar (300 PSI) to 206.8 bar (3000 PSI) in standard 3.5 bar (50 PSI) increments Maximum input pressure all models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206.8...

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pressure modulating brake valves, relay valves, and steering assist valves-10

Pedal Actuated (single) Typical Brake Valve Floor Mounted Pedal (vertical valve) millimeters inches Dimensions may vary slightly by model number. SPECIFICATIONS Model Number Catalog Code Nominal Brake Pressure Setting Tolerance Approximate Pedal Force at Pressure Setting Brake pressure setting range all models 20.7 bar (300 PSI) to 206.8 bar (3000 PSI) in standard 3.5 bar (50 PSI) increments Maximum input pressure all models 206.8 bar (3000 PSI) Consult MICO Applications Department for other available models and application detail.

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pressure modulating brake valves, relay valves, and steering assist valves-11

Pedal Actuated (single with switch) Typical Brake Valve Floor Mounted Pedal (vertical valve) millimeters inches Dimensions may vary slightly by model number. SPECIFICATIONS Model Number Catalog Code (refer to page 5) Nominal Brake Pressure Setting Tolerance Approximate Pedal Force at Pressure Setting Brake pressure setting range all models . . . . . . . . . . . . . . . . . 20.7 bar (300 PSI) to 206.8 bar (3000 PSI) in standard 3.5 bar (50 PSI) increments Maximum input pressure all models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

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pressure modulating brake valves, relay valves, and steering assist valves-12

Pedal Actuated (single) Typical Brake Valve Floor Mounted Pedal (horizontal valve) millimeters inches Dimensions may vary slightly by model number. SPECIFICATIONS Model Number Catalog Code Nominal Brake Pressure Setting Tolerance Approximate Pedal Force at Pressure Setting Brake pressure setting range all models . . . . . . . . . . . . . . . . . 20.7 bar (300 PSI) to 206.8 bar (3000 PSI) in standard 3.5 bar (50 PSI) increments Maximum input pressure all models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

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pressure modulating brake valves, relay valves, and steering assist valves-13

Pedal Actuated (single) Typical Brake Valve Suspended Pedal (horizontal valve) millimeters inches Dimensions may vary slightly by model number. SPECIFICATIONS Model Number Catalog Code Nominal Brake Pressure Setting Tolerance Approximate Pedal Force at Pressure Setting Brake pressure setting range all models . . . . . . . . . . . . . . . . . 20.7 bar (300 PSI) to 206.8 bar (3000 PSI) in standard 3.5 bar (50 PSI) increments Maximum input pressure all models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

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All MICO, Incorporated catalogs and technical brochures