ZF offers a broad range of full power hydraulic brake valves providing reliable and efficient energy management for the off-highway market. ZF's valve portfolio includes accumulator charging valves, modulating valves, full power valves, park brake valves, and steering assist valves.
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ZF Off-Highway Product Guide (Form Number 80-950-006)
This is our introductory catalog for ZF Off-Highway Solutions Minnesota Inc. products. It provides product photos and brief descriptions of the product portfolio offerings in brakes, brake actuation, valves, and controls.
Accumulator Charging Valves
Providing Reliable and Efficient Energy System Management
ZF Accumulator Charging Valves offer energy efficient charging cycles reducing operating costs that improves the proficiency of your application.
With over 45 years of proven designs, the accumulator charging valves are built for heavy-duty mobile equipment. Used in open center and load sensing hydraulic systems, these valves can include various options such as a relief valve to limit main hydraulic system pressure.
Your advantages:
- Improves efficiency by having no continuous drain of oil to reservoir
- Integrates easily into the hydraulic braking system
- No secondary fluid source required
- Variety of pressure ranges between high and low limites available in order to reduce pump cycle time
Single Accumulator Charging Valve Charges Accumulator in a Hydraulic Brake Circuit
Designed for installation in open center hydraulic systems, these valves use an internal spool valve to control hydraulic system flow to pressurize an accumulator.
- Flow rates to 113 I/min (30 gpm)
- Remotely mounted from brake valves
- Supplies oil to an accumulator from an open center circuit on demand at a preset rate
Dual Accumulator Charging Valve Charges Accumulator in a Dual Hydraulic Brake Circuit
These valves monitor accumulator pressure and control hydraulic system flow to pressurize accumulators from two independent accumulator ports.
- Load sensing options available
- Uses power developed in the main hydraulic system
- Built-in relief valve to limit the main hydraulic system pressure
Accumulator Charging Valve With Relief Single and Dual
The function of these charging valves with relief is the same as either the single or dual charging valves above. However, a main hydraulic system relief valve is incorporated.
Accumulator Charging Valves with Load Sensing Single and Dual
Load sensing charging valves send a load sense signal to a load compensated pump creating energy efficient circuits. The charging function is the same as the single or dual charging valves, and is used in load sensing hydraulic circuits.
Universal Charging Valve
Expand existing accumulator charging valve applications with innovative product offering to suite modular customization. The MICO Universal Charging Valve provides the custom configuration features of a manifold block with high performance of a cast valve housing to create common solutions across multiple machine platforms.
Your advantages:
- Create common solutions across multiple machine platforms to streamline assembly
- Reduces need to order/stock large number of model numbers simplifying supply chain and purchasing
- Simplified design eliminates the need for additional components
- No shock or undesirable noise
Related documents for Accumulator Charging Valves
Accumulator Charging Valves Catalog (Form Number 84-463-001)
This 28-page catalog is loaded with features, model numbers and specifications.
Application Data Sheet - Brake Valves (Form Number 80-460-042)
This sheet is used for Brake Valve System applications.
ZF uses application data sheets to collect machine and/or vehicle information specific to an application. They are also helpful for understanding the environment and manner in which the machine/vehicle will be operated. Our Engineering Department uses application data sheet information to select suitable brake components that are designed to meet your application needs.
ZF holds this information in strict confidence. Your machine/vehicle information is strictly for application assistance and will not be sold or shared with anyone outside of ZF.
Check Valve Assembly (Form Number 80-463-015)
A two-page Product Bulletin with product description, benefits, features, and specifications. There are also dimensional drawings and a schematic.
Universal Accumulator Charging Valve Product Bulletin (Form Number 80-463-018)
Product Bulletin for ACV-V Accumlator Charging Valves
Custom Engineered Accumulator Charging Valves
ZF custom engineers products for specific applications that meets or exceeds customer specific requirements. Contact a ZF Off-Highway Braking Solutions representative for your custom solution today.
Park Brake Valves
Park Brake Valves With Auto Apply
Provides added safety for operator and vehicle by controlling actuation of a spring apply, hydraulic release park brake.
- Can function automatically and manually
- Controls on/off function of spring apply/hydraulic release parking brake
- Valve senses accumulator brake pressure and automatically apply brakes at a predetermined pressure
Related documents for Park Brake Valves
Hydraulic Brake Valves Catalog (Form Number 84-466-001)
This 64-page catalog is loaded with features, model numbers and specifications.
Application Data Sheet - Brake Valves (Form Number 80-460-042)
This sheet is used for Brake Valve System applications.
ZF uses application data sheets to collect machine and/or vehicle information specific to an application. They are also helpful for understanding the environment and manner in which the machine/vehicle will be operated. Our Engineering Department uses application data sheet information to select suitable brake components that are designed to meet your application needs.
ZF holds this information in strict confidence. Your machine/vehicle information is strictly for application assistance and will not be sold or shared with anyone outside of ZF.
Modulating Valves
Providing directional control of brake system pressure
Robust ZF Modulating Brake Valves assure reliable brake performance in demanding off-highway conditions. Extensive experience with heavy-duty off-highway machine braking makes it possible to offer a broad range of modulating hydraulic brake valves. These can be designed to customer-specified braking requirements.
- Design allows for superior brake performance through minimal leakage and low hysteresis
- Oil immersed spring cavity protects return springs from outside contaminants
- When used with properly sized accumulator and charging valve, emergency power-off braking is available
- Broad range of modulating valves include two stage modulation for customized pedal feel
Single Modulating Valve Available feedback for electronic pedal angle control capability
When used with a properly sized accumulator and accumulator charging valve, the single modulating valves can provide normal and emergency power-off braking in a variety of open center, closed center and load sensing hydraulic systems.
- Compact design is customizable to applications requirements
- Spool design provides smooth modulation at specified pressures
- Optional designs with built-in switches, and potentiometers
- Eliminates the need for a separate power brake unit or separate hydraulic fluid system
Tandem Modulating Valve Superior Brake Performance
Operates similar to the single modulating valves, except two independent pressure outputs are provided. If either half of a dual brake system fails, the other half will continue to provide braking function.
- Eliminates the need for separate power brake unit or separate hydraulic fluid system
- Available as valve only, push-rod actuated, lever actuated and pedal actuated
- Optional designs with built-in switches, and potentiometers
Reverse Modulating Valve Robust pedal design for demanding environment
Reverse modulating valves are used in negative brake systems for controlled actuation of spring apply/hydraulic release service brake. As the pedal is applied, pressure to the brake is reduced causing the brake to engage.
- Precise control of modulated output pressure
- Can be actuated by pull mechanism, or pedal
- Optional lock lever available on pedal designs to hold at full release pressure
Relay Valves
A closed center design used for modulating output pressures up to 3000 PSI. Can be adapted to a variety of hydraulic systems. Power off-braking through limited stored energy in the accumulator(s). ZF also makes a hydraulic over air relay valve. These valves output air pressure in proportion to the hydraulic input pressure. Hydraulic input pressure, from a component such as a master cylinder or hydraulic control valve, sends a pilot signal to the relay valve to moderate air brake pressure.
Dual Power Brake Valves for Steering Assist Easily Adapted to Dual Pedal Systems
This design can easily adapt to many dual pedal systems to provide steering assist power braking with one pedal applied or full power braking with both pedals applied giving equally balanced brake pressures.
- Compact integrated design for use in restricted space
- Power off braking through limited stored energy in the accumulators
- Direct acting spool provides a pedal feel accurately representing brake pressure
Related documents for Modulating Valves
Hydraulic Brake Valves Catalog (Form Number 84-466-001)
This 64-page catalog is loaded with features, model numbers and specifications.
Application Data Sheet - Brake Valves (Form Number 80-460-042)
This sheet is used for Brake Valve System applications.
ZF uses application data sheets to collect machine and/or vehicle information specific to an application. They are also helpful for understanding the environment and manner in which the machine/vehicle will be operated. Our Engineering Department uses application data sheet information to select suitable brake components that are designed to meet your application needs.
ZF holds this information in strict confidence. Your machine/vehicle information is strictly for application assistance and will not be sold or shared with anyone outside of ZF.
Application Data Sheet - Reverse Modulating Valves (Form Number 80-460-046)
This sheet is used for Reverse Modulating Brake Valve applications. These valves are intended for mobile equipment and are normally used in conjunction with spring apply hydraulic release brakes.
ZF uses application data sheets to collect machine and/or vehicle information specific to an application. They are also helpful for understanding the environment and manner in which the machine/vehicle will be operated. Our Engineering Department uses application data sheet information to select suitable brake components that are designed to meet your application needs.
ZF holds this information in strict confidence. Your machine/vehicle information is strictly for application assistance and will not be sold or shared with anyone outside of ZF.
Hydraulic over Air Relay Valves (Form Number 80-460-051)
A two-page Product Bulletin with product description, specifications, and ANSI symbols. There are also ratio graphs and dimensional drawings.
Custom Engineered Modulating Valves
ZF custom engineers products for specific applications that meets or exceeds customer specific requirements. Contact a ZF Off-Highway Braking Solutions representative for your custom solution today.