How Hydraulic Valves Work

Calculation of theoretical output force

Push F1=A1XP1X B
PulI F2=A2XP2X B
A1 : push side pressed area (cm~)A1=nD/4=0.785D
A2 : pull side pressed area (cm~A2=n(Dd)/4=0.785(Dd
D : piston diameter(cm)
d : rod diameter(cm)
P1 : input pressure for pushing forward (kgf/cm~)

P2 : input pressure for pulling backward (kf/cm~) :load ratio
note : 1.the practical out put force of a cylinder is lessthan theoretical force.
2.when a cylinderis moving regularly,load ratiois usully chosen as 0.8,Otherwise 0.6 is used.
example :assume output force is 1000 kgs and workpressure is 70kgf/cmWhat is the suitable bore ofthe cylinder?Ans;
output force F=1000kg
working pressure P=70kgf/cm
load ratioB=08
F,=A,XPXB
A,=F,/(P,X B)=1000/(70X0.8)=17.86cm
A=nD/4=0785D
so..D'=17.86/0.785=22.75cm
D=/22.75=4.8cm=48mm
the suitable bore size is 50mm

Features:

1.Proximity's signal is detected by magnetic sensing between a proximity on the surfaceof a tube and a magnet embeded in piston.

2.The position of proimity's signal is determined by the position of proximity resided on thesurface of the cylinder tube.

3.Proximity can be set and aligned easily that saves time in design and assembly.

4.Extermal dimensions of MGHC inductive cylinders are the same as HC tie-rod cylinders.

Port and ushion positions

SD type	LA type
Standard=A:input port    B:Cushion position    D:Check valve position

e.g:order form for position HCA70-LA-C-100X200-B-B-A

Input port=B position

Cushion=A position

Cushion length

	Bore(mm)	L	l
	32--63	20	10
	80--160	25	15
	180--224	30	27
	250	35	32

• Should the movement of a cylinder with loading is above 500mm/sec.,
• If the moving speed is higher than 750mm/sec,external reducing speed valves should be used

The application not only for production mechanical machine tools and metal processing equipment, but also can be widely used in actuators of steel, nuclear power plant control, passenger elevators, etc
 

Type	Symbol	Drawing	With Bellow	Heat Proof	Bore(mm)
					32,40,50,63,80,100,125,150,180,200,224,250
Double acting	HCA		HCA-H	HCA-J
Double rod	HCC		HCC-H	HCC-J
Double rods with alignment	HCD		HCD-H	HCD-J

HC2--A--70--    --SD--C--100--200ST--    --    --    --    --    --    

           1)   2)    3)    4)     5)     6)        7)        8)    9)   10)  11)  12)   13) 

Specifying the needed material while ordering

(1)N:NBR

(2)V:F≤200℃

Factory:

 Where are hydraulic cylinders used?

Hydraulic cylinders are pretty versatile components. You can find them in various applications across different industries.

They're commonly used in construction equipment like excavators and bulldozers for moving heavy loads. They also play

a crucial role in manufacturing processes, such as in metal stamping machines and plastic molding equipment. You'll even

spot them in everyday things like car brakes and office chairs. So, whether you're building, manufacturing, or just sitting at

your desk, there's a good chance there's a hydraulic cylinder working behind the scenes!

What are the three types of hydraulic cylinders?

There are three main types of hydraulic cylinders, each designed for specific applications and operating conditions:

1. Single-Acting Hydraulic Cylinder

• Operation: In a single-acting cylinder, hydraulic fluid is pressurized on only one side of the piston, typically to extend the piston rod. The return motion is achieved either by an external force, such as gravity or a spring, when the pressure is released.
• Applications: These cylinders are commonly used in applications like jacks, hydraulic presses, and lifting devices where the return force is not as critical or can be provided by external factors.

2. Double-Acting Hydraulic Cylinder

• Operation: A double-acting cylinder has two ports for hydraulic fluid: one for extending the piston rod and another for retracting it. Hydraulic fluid is alternately pressurized on both sides of the piston, allowing for controlled extension and retraction.
• Applications: These are more versatile and are used in a wide range of machinery, including construction equipment (e.g., excavators), industrial machinery, and automotive systems, where precise and consistent movement in both directions is required.

3. Telescopic Hydraulic Cylinder

• Operation: Telescopic cylinders consist of multiple stages or sleeves that extend sequentially. They are typically single-acting, but double-acting versions also exist. These cylinders allow for a much longer stroke than standard cylinders of similar retracted length.
• Applications: Telescopic cylinders are often used in applications where space is limited but a long stroke is needed, such as in dump trucks, cranes, and material handling equipment.

Each type of hydraulic cylinder has its unique advantages, making it suitable for different industrial and mechanical applications.

How Hydraulic Valves Work

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