HAWE HYDRAULIK. Hawe Hydraulics Co. was founded in 1949, 50 years has been committed to the development and production of high-pressure hydraulic components and systems. The company currently employs more than 1,800, a number of sales offices in Germany and in the world has more than 30 sales agents, 13 wholly-owned subsidiaries. HAWE product is characterized by all-steel body, high pressure; compact structure, small size; no leakage, long service life, widely used in construction machinery, machine tools, shipbuilding, metallurgy, hydraulic tools and other industries. One-way valve RK and RB spiral flow check valve cartridge Qmax = 120I / min Working pressure pmax = 700bar 1, Overview of such a one-way valve, single blind hole screwed into the shoulder of the screw, the drill processing 118. Apex of the valve hole at the shoulder, with an O-ring seal. This cartridge valve consists of two components, elements sometimes convex like (RK) type or pre-compression mode coupling. Between them by a positioning spring preload hemisphere spool, which consists of rolled stainless steel and hardened and polished; similarly, its seat has been hardened and ground. 2, supply different specifications and main technical parameters such as; RK2 RB2G CRK CRB CRH spiral cartridge check valves for simple screw-threaded hole operating pressure pmax = 500bar flow Qmax = 80I / min 1, an overview of the one-way valve divided into two categories; --- CRK and CRB check valve type is generally ---- CRH type check valve in common is a simple threaded hole formed in the valve element which is screwed into and out of the oil port. seal between the valve assembly is sealed by the front end side, and the mounting precision thread bottom contact between the stepped shoulder achieved, such as stepped shoulder is formed when common steel member 118. The bottom hole drilling slant. with Bottom seal to load, and there is no need for a sliding bevel reaming external screw-valve seal and locking threaded reached with seals and O-ring seal nut with pilot pressure relief reverse When open, the valve port quickly open the entire flow cross-section, in order to open intermittently under pressure to avoid the impact of possible relief, it should control the oil passage plug on the body as a small diameter to form the throttle pipe characteristic Specifications valve 3 in the z-oil aisle formed throttling point for the high-pressure high-volume load, size 3 for pre-relief structure, then in the relief process, a small check valve before the main valve Open mouth, through the smaller flow cross-section, the impact of the load pressure can be gradually lifted. Additional throttle control channels, improve the effectiveness of pre-relief. 2, supply different specifications and main technical data Ordering example ; CRK1 CRH2 CRH3V B-type check valve pressure Pmax = 500bar flow Qmax = 160 1 / min 1. Overview of the check valve allows flow in one direction through the flow in the opposite direction of the cut-off (DINISO1219-1). 2, the main parameters available varieties and pressure flow code and main parameters B1-1 B2-1 B3-1 500 15 B1-1 B2-2 B3-2 20 B1-3 B2-3 B3-3 30 B1-4 B2- 4 B3-4 45 B1-5 B2-5 B3-5 75 B1-6 B2-6 B3-6 120 B1-7 B2-7 B3-7 160 RHC and RHCE type hydraulic control spiral cartridge belt and check valve Without pre-unloading hydraulic pressure pmax = 500bar flow Qmax = 200I / min 1, Overview This valve is designed to seat valve type, according to DIN ISO 1219-1 standards are set only valve. A --- B direction of flow cutoff date, B - B Channel - A direction of liquid flow stream, you can open the A hydraulic control. Applications. When used in conjunction with regular leakage directional valve spool valve, zero leakage may be latching cylinder. When double-acting hydraulic cylinder return, as the directional valve unloading oil return passage. As a hydraulic control valve back to the oil or circulating such a check valve as a screw-in cartridge valves, when the composition of the system, simply plug assembly easily screwed into the screw holes in the valve block. O-ring on the valve configuration steps, and mounting steps, such as through the valve body thread bottom in close contact between the shoulder, to achieve a seal between the load port A and B. When starting hole drilled, any standard steel drill bit (apex 118.) can automatically formed ladder stairs. Therefore, there is no need then to improve the method of reaming the hole and the bottom hole of the step (apex seal bore) finish. Seal between the control port z and the actuator side port B, is generally achieved by screwing the threaded hole size tolerances need to adapt (see table with dimensions) if this is not allowed (small) leakage, now available provide two threads and control spool valves are sealed. In addition there is a control valve with unloading variant, it needs to have an additional drain port, thus, in the A port with a load, it is impossible to open additional valve damping (see Section 5 for examples) The following diagrams illustrate the structure of the valve plug and typical installation examples. The plug (in line with DIN908 or 910 standard), and ring (in accordance with DIN7603 standard) will illustrate the mounting holes from the outside world. Without pre-unloading check valve (RHC type) which is a ball valve spool. A chamber once the unloading valve, the valve port open, full flow through the A --- B. Get the heart rate switching valve damping, largely avoided this may happen suddenly opened and unloading shock. If the impact occurs during the test, then the control circuit must install an auxiliary import restrictor, or with pre-unloading system. . With pre-unloading check valve (RHC, V-type) a little ball check valve provided in the main poppet (spherical valve port side), the valve seat in the main valve cavity. Before opening the main valve is opened, the small ball check valve first opens, the annular gap formed from the throttling effect, achieved without shock (pre), unloaded. They are mainly used for high pressure and high flow systems. Control oil supply additional throttle road, enhanced pre-unloading effect. . With unloading control piston check valve (RHCE type) This check valve available with and without pre-unloading structure type (see above), the valve opening pressure valve back Oil pressure switch PB. This is because the additional pre-charge control piston through the drain port L 2 supply different specifications and main technical parameters RHC RHC4V with the control piston valve leakage through additional port unloading valve Ordering example RHCE charge; RHCE33V HRP-type liquid check valve with and without pre-unloading plate connecting the hydraulic operating pressure Pmax = 700bar flow Qmax = 400lpm 1. Overview of the general flow check valve allows free flow in one direction, as in the opposite direction. Check valve, is set only by the pilot uninstall feature to remove the opposite direction. For external control type check valve, by a road outside the oil control to achieve control unloaded; for internal style, through the solenoid valve is mounted directly to the internal implementation. This solenoid valve, or is in line with the requirements of G. D7300 (W.) 3-0B0.4 type, or is in line D7470A / I requirements WH IH (M) type, which uses a spring-loaded check valve, leak-free valve structure, all the parts are made of steel, and can be installed Users create their own valve plate. Structure types. Without hydraulic pre unloaded check valve. When the reverse relief, quickly open the entire overcurrent valve port, suitable for all standard conditions. Control port orifice, to the relief of the piston from the damping effect of the switch campaign, in most cases can effectively eliminate pressure shocks. Nevertheless, the system may occur Shihai brake pressure shock, then you can load an additional orifice, so that the damping effect of reducing the rate of more intense relief that the valve port closed slows down. . Check valve with hydraulic pre unloaded more suitable for high pressure and high flow situations, a small ball check valve provided in the main poppet (spherical valve port side), the seat is in the main spool upper chamber. Before opening the main valve is opened, the small ball check valve is opened, the annular space formed from the throttling effect, impact-free pre-uninstall. Pre-relief function more effectively, it means that the main control valve to open lower rate, preload more relaxed. In the control loop install an additional damper, are often very effective. Applications. When used in conjunction with regular leakage directional valve spool valve, zero leakage may be latching cylinder. When double-acting hydraulic cylinder return, as the directional valve unloading oil return passage. A pilot has two 2/2 directional valve function move 2, supply different specifications and main technical parameters. Ordering example; HRP2-B0,4 HRP7V-X HRP4V-WG3-0B0,4-WG230 bidirectional hydraulic lock DRH pressure Pmax = 500bar flow Qmax = 140lpm 1. Overview bidirectional check valve closing valves are used to cut a direction of liquid flow, while in the reverse pass freely, comprising two side check valve, can be automatically shut down the respective flow, can alternately be opened by the pilot. With commutation combined slide valve, mainly used for leak-free double-acting actuators packing elements or position in a fixed bit. Check valve actuators are used to turn on or off the flow by pumping spool type valve to control, or when several spool type valve in parallel, there are a few tools has chosen to achieve the required action hydraulic circuit, which hydraulic circuit can be found in the corresponding fifth chapter, its port A or port B of the opening pressure is about 0.4 times the pressure of the other side, i.e., the pilot ratio is 1; 2.5 band limitation valve The type is used for hydraulic motors or rotating cylinders or with a small pressure valve to prevent pressure build slowly, such as temperature rise caused by volume expansion and pressure. . Check valve with drain port when there are several series have internal leakage of change to the slide valve together, if a valve downstream in the working position, then all will be along the upstream valve P to system pressure load R pathway, can leak oil slowly infiltrate into the working oil in the oil leak continuously discharged through a separate pipe leak to prevent leakage due to unavoidable gradually build pressure and may cause the actuator moving, when the one-way valve in the open position, the drain port is closed. . With pre-discharge check valve when the valve is used for inappropriate cylinder base area ratio, or the load acting on the hydraulic cylinder rod chamber caused it can not be opened properly released, often need to use with pre-release function one-way valve, with pre-vent can eliminate 10% of the pressure generated on the other side of the direction, with pre-vent valve functions can be mounted on the side or on both sides mounted RH-type check valve manifold design working pressure pmax = 700bar flow Qmax = 160lpm 1, Overview RH type belonging to DIN ISO 1219-1 by the pilot-operated check valves control valve. Flow is cut off from A to B direction, reverse free flow. Is cut off from A to B direction, which can be opened by the flow of hydraulic pilot type. Application;. And there is a leak in the valve spool type used in combination to achieve without leakage lock cylinder. For double-acting hydraulic cylinder piston rod retracted condition, due to volume ratio of the relations machine is greater than the allowable flow valve to achieve back to the oil pressure relief. Hydraulically driven unloading or delivery varieties RH type circulating valve valve; with or without pre-pilot with relief agencies can not bring this pre-relief valve bodies to the ball for the valve to open soon to the entire overcurrent valve opens. This valve is suitable for all common runtime system. Control interface in the restrictor, the opening of the control valve controlling a damping effect, therefore, largely suppressing the pressure shocks. If at the time of the impact test, can be rolled up like a choke control tubing, to achieve the necessary additional damping. This relief agencies with pre-check valve spool is not a ball, but after grinding warheads poppet, spool with a small pre-ball check valve. In the opening process, before the warhead ball valve open, the ball check valve pre-open it to get it off without pressure shock load cavity open pre-unloading effect. This structure of the valve, mainly for high-pressure, large load of the system cavity. The more stable control valve operation, opening speed more slowly, this pre-relief of the better. When necessary, where you can also use a choke like to take over control of oil to achieve. 2. Availability of different specifications, the main parameters. Base-belt pre-flow pressure relief agencies RH1 ---- 700 15 RH2 ----- 35 RH3 RH3V 55 RH4 RH4V 500 100 RH5 RH5V 160 F-type check valve and fill valve 1. Introduction (1) applied as one-way valve, the flow may flow freely in one direction, while turned off, as a main valve, in press control for replenishment of oil in the opposite direction, and in the closed emptying the oil hydraulic cylinder, the quick When the oil into the open. In closing direction, the valve leak-free seal (2) non-impact relief filling valve generally do not take the time to make the filling valve, or according to the specifications selectively pre relief pilot zone function. In the conventional structure without the pre-unloading, the relief valve is achieved by a band-stop press hole series or the hydraulic cylinder through the throttle fully down, the pre-equipped with pressure relief valve, the loss of Pressure is automatic. (3) Install the valve mounted directly on the front surface of the bottom of the cylinder and pre-welded flange. Seal diameter should be selected such, it is necessary to apply a standard flange, the second is to keep working pressure does not exceed the permitted limit of the material yield 2,2 given section. According to the specifications of size, seals with DIN7603- type A, (4) works. Pressure relief valve, filling filling process damping valve is based on a built-in damping fluid resistance, in order to prevent mechanical shock loads acting on the valve member. The fluid resistance also play a role in delaying the closing speed, according to the model you want to consider about 0,2S 0,7S time, the corresponding oil viscosity of about 60mm / s. In most operating conditions, it will not have problems, because the closing process has been returned in the press in the end of the trip. If you want to send control signals required for faster shutdown, such as pneumatic stroke, then the liquid is removed from the interface block resistance, for use by D6969B way throttling. . As a one-way check valve when the valve is used, should be taken to avoid a sudden increase in the volume of traffic on the opening direction, for example, when the direction of the slide valve control, as a result of the oil pipeline actuators effects arising from the accumulator to be. For the pilot control slide valve, for example, by adjusting the switching time, to avoid a sudden increase in the flow of the phenomenon. Thus, the valve for maximum flow range, the primary issue is to avoid too strong to push the disc to trip block to avoid suffering due to excessive force and damage the quality of the anti-LB-type pipe break safety valve pressure Pmax = 500bar flow Qamax = 160I / min 1, an overview of the pipe or fittings due to pressure slope crack, it will lose backpressure. The forward, with load of hydraulic actuators, will fall uncontrolled acceleration. Anti-breaking pipeline safety valve, to prevent the occurrence of hydraulic actuators such uncontrolled movement. When used, the pipeline must be anti-breaking screwed directly into the pressure relief valve oil imports to protect the hydraulic actuators. LB-type valve is a flat valve. In the natural state, the valve plate away from the valve seat under the action of spring force, to maintain a certain degree of valve opening. When the flow through the flow from B F, due to the flow resistance, there is a pressure difference valve port, the valve plate at both ends and thus have the same pressure and flow direction of a force. In normal operation off state, this force does not exceed the spring force, so that the valve is always open. If due to overload, the flow through the valve is greatly increased, when the aforementioned differential pressure force will exceed the spring force, the valve closes immediately. There are two forms of anti-breaking valve conduit, which differences are as follows; 1, load type when the pipe is in place for blasting, the valve plate firmly pressed against the annular valve seat, and the leakage through between the threads, the system no significant impact, therefore, be able to stay in the pipeline rupture load moment on the stroke position, the damaging effects of the bursting of the immediate elimination of dangerous situations in accordance with the security, or to bear the load after elimination. Then to the implementing agencies in the oil supply pressure, the valve will reopen two load slow decline valve orifice plate has a certain diameter, pipe bursting, the PQ characteristics in accordance with its pre-estimate of an oil can be good flows through this orifice from B F, irrespective of the size of this flow, and basic load size, therefore, the load can gradually lowered to the ground. Then, the destructive effects of blasting eliminated. 2, the structure and the main data available LB 2C -40 LB3F0.8-63 LB3C1.07 / 8-14UNF-50 WV and WVC type shuttle valve pipe connection screw valve cartridge valve operating pressure pmax = 315bar flow Qmax = 125lpm 1, an overview of the shuttle valve is a two-closable inlet and an outlet flow shutoff valve (check valve), high pressure inflow and outflow end communicated, another inflow end so it is closed (DIN ISO 1219-1), which function automatically.