55T11C and 56T11C offer the same performance as the 55Tll that was highlighted in last quarter's newsletter but now with the customer requested feature; counterclockwise adjustment to increase relief pressure. 

Look for these catalog pages to be on the website in the very near future. 

Flow Regulating Valves

-Definition:  Vonberg flow regulating valves are designed to limit the amount of flow going to or from a hydraulic actuator. (Hydraulic cylinder or motor)

Vonberg flow regulating valves are pressure compensated to provide a constant flow of oil regardless of any changes in the inlet pressure, i.e. heavy load verses light load, etc. 

Currently Vonberg supplies valves with a factory preset flow ranging up to 80gpm.  Flow regulation takes place in the direction of the arrow (printed on valve) with reverse flow uncontrolled and unrestricted.  Flows are controlled with a +/- 15% tolerance up to 1.5 gpm and +/- 10% at higher flows.  Valve bodies can be made of aluminum (3000 psi max) or steel (5000 psi max).  Four types of valve styles are available:  1) in line, 2) slip-in insertable, 3) threaded insertable or 4) cartridge.

Vonberg also manufactures a complete line of flow regulating valves in our exclusive S.I.D. (Surges Internally Dampened) series.  Vonberg engineers originally developed this flow regulator for the material handling market.  It is uniquely designed to eliminate instability (bouncing or lurching) inherent in most load lowering applications.  These high quality valves have achieved universal acceptance among every major forklift manufacturer including: Clark, Prime-Mover, Crown, Raymond, Nissan and Toyota to name just a few.

-Applications:  There are three basic ways to control flow in actuators: 

1) Meter-in circuits will have the flow regulator placed to control the amount of fluid entering a cylinder.   This type of circuitry is commonly used to control the extension of a cylinder when lifting a load vertically.

2) Meter-out circuits control the flow exiting a cylinder or motor.  For cylinders, this application is best suited for over-running loads including drilling, boring, or dumping.  Speed control of motors can be accomplished by using a valve on the outlet port.  For some applications with double acting cylinders, a pair of flow controls mounted back to back is required to control flow in both directions. 

3) In a bleed off circuit, the flow regulator is placed in parallel with the actuator and bypasses a portion of pump output flow to tank.  This is theoretically more efficient than using a relief valve since pump pressure need only be high enough to overcome resistance.

Adaptations of these basic principles can be utilized to give numerous types of control circuits. 

-Sales Features:

1) Broadest range of in line body sizes in the industry ¼” through 1 ½”.

2) Broadest ranges of thread options including NPTF, SAE, JIC, BSPP, Metric or ORS.

3) The only manufacturer that offers an S.I.D. series valve universally accepted by the material handling industry.

4) Most competitively priced valve on the market for both in-line and cartridge series.  

5) Largest valve component inventory of any flow regulator manufacturer, assuring your customer immediate delivery.

6) State of the art CNC manufacturing facility to meet any requirement, both standard and custom.

 -Typical Markets: The largest markets for flow regulators are:

1)  Forklifts, including industrial and rough terrain (mast lift cylinders). In-line and cartridge styles are used.

2) Hydraulic lifts, including platform, aerial basket and table (lift and bucket cylinders).  In-line and cartridge styles are used.

3) Hydraulic tailgate lifts (main cylinder).  In-line and cartridge styles are used.

4) Mobile hydraulic cylinder manufacturers.  Cartridge style flow regulators are used; standard, insertable and slip-in.

Additional markets where flow regulators are used include wheelchair lifts for buses and vans, refuse compactors and balers, airport ground equipment, mobile drilling rigs and construction equipment including cranes, backhoes, excavators and trenchers, fire apparatus equipment and many more.

Website News 

The Vonberg website is continuously being updated and improved.  Check it out and see what’s new.