Function And Selection Of C Frame Press

    Reversing valve is the use of valve heart and valve body of the relative movement of valve, so that connected with the valve body of the circuit to achieve, disconnect or change the flow direction of the valve class. The basic requirements of the reversing valve are: (1) The pressure loss is small when the liquid flow passes through the valve (general AP P. 1-0.3 MPa), (2) The leakage of the valves with no mutual connection is small, and (3) the commutation is reliable, rapid and steady without impact.C Frame Press
     Sliding valve function, three-bit four-pass and three-bit five-way directional valve, the valve in the middle of the connection between the oil port is called sliding valve function. Different sliding valve functions can meet the different requirements of the system. Three-bit valves are commonly used in several types of sliding valve function, and the left and right side of the oil ports are connected through or cross the same way, so only one letter to indicate the form of the median. The valve body of different function is the general piece, and the difference is only the number of the valve heart abutment structure, the axial dimension and the radial through hole on the valve heart. Sometimes due to the special requirements of the use of the sliding valve at one end or both ends of the connection design into a special function, respectively, the first letter, the second letter and the third letter to indicate the median, right and left position of the sliding valve function. The transition function of the sliding valve is also specified and designed when the oil U valve on-off relationship of the reversing valve is transited from one station to the other. For a two-bit four-pass slide valve. In order to avoid the pressure impact caused by the sudden and complete closure of the corpse mouth during the commutation process, it is required that the 4 oil ports, such as P, a, B and T, have a half-open connected state when the transition state is reversed, that is, the transition function with H-type or X-type. In the hydraulic symbol, the transition function is drawn in the valve of the sign of each station and separated by a dotted line.C Frame Press
     Two different transition functions of type 0 three-bit four-way directional valve. When the position is reversed to the left, it is first connected to B and T. And then to the B and T. When transitioning from the bit to the right, there are similar transitions. Increase the transition function will add long valve heart stroke, this is particularly detrimental to the solenoid directional valve, because too long valve heart travel not only affects the electromagnetic directional valve action reliability, but also extended its action valve, so the electromagnetic reversing valve is generally standard reversing function without setting the transition function. Only the hydraulic (or electro-hydraulic) reversing valve is designed to be a different transitional function.C Frame Press
     The correct choice of direction control valve should first consider the technical specifications of the valve to meet the requirements of the environment. such as gas source working pressure range, power supply conditions (AC, DC and voltage, etc.) medium temperature, ambient temperature, humidity, dust and so on. More important is to consider the function and function of the valve to meet the needs, as far as possible to select a consistent valve. The correct selection of directional control valve is an important part of designing pneumatic system and pneumatic control system, which can simplify the line, reduce the variety and quantity of the control valve, reduce the consumption of compressed air, reduce the cost and improve the reliability of the system.C Frame Press