Rexroth 8-position manual shift valve 8P-1S/P55556-3 in stock.

Brand

REXROTH/German Rexroth

Application Areas

Petroleum, Mining, Energy, Electrical, General

Rexroth Solenoid Valves, Rexroth Piston Pumps, Rexroth Relief Valves, Rexroth Proportional Valves, Rexroth Vane Pumps

Rexroth manual shift valves are directional control valves with two or more flow patterns and two or more ports. They are valves used to achieve the communication, cut-off, and reversal of hydraulic oil flow, as well as pressure unloading and sequential action control.

Rexroth Manual Shift Valve Working Principle

The six-way directional valve mainly consists of a valve body, sealing components, cam, valve stem, handle, and valve cover (Figure 1). The valve is driven by the handle, which drives the valve stem and cam to rotate. The cam has the functions of positioning, driving, and locking the opening and closing of the sealing components. When the handle is rotated counterclockwise, the two sets of sealing components close the two lower channels under the action of the cam, while the two upper channels are connected to the inlet of the pipeline device. Conversely, the two upper channels are closed, while the two lower channels are connected to the inlet of the pipeline device, achieving non-stop directional switching.

Six-way directional valve

Six-way directional valve

1 Upper valve cover 2 Handle 3 Valve stem 4 Cam 5 Sealing assembly 6 Valve cover 7 Valve body

(1) The valve body of the six-way valve is divided into two chambers by a partition, each chamber having three channels, with the middle being the oil inlet and both ends being the oil outlets. The valve body is a welded carbon steel plate structure, small in size, light in weight, and compact in structure, improving material utilization, shortening the production cycle, and reducing costs. The sealing surface is overlaid with stainless steel, which is rust-proof and corrosion-resistant. After precision machining, the sealing surface is polished and ground, with a surface roughness Ra≤0.8μm.

(2) The six-way valve has two sets of sealing assemblies. Each set of sealing assemblies (Figure 2) consists of a valve disc, sealing ring, adjusting block, adjusting screw, clamping plate, and bolts. The valve disc is a welded carbon steel plate component with reinforcing ribs, which both increase the strength of the valve disc and provide guidance, ensuring the coaxiality between each set of valve discs. A polyurethane rubber ring is embedded in the valve disc. This material is characterized by oil resistance, wear resistance, stable performance, good sealing, and long service life. Under the action of the cam, the spherical surface of the sealing ring contacts the sealing surface of the valve body, generating compressive elastic deformation to achieve a sealing effect. The adjusting block and adjusting screw can be used to adjust when the two sets of sealing components cannot be in place synchronously, ensuring that the sealing performance of each channel is synchronized.

Sealing Components

Sealing Components

1 Clamping Plate

2 Bolt

3 Adjusting Block

4 Valve Disc

5 Sealing Ring

6 Adjusting Screw

(3) The axial seal between the valve stem and the valve body partition and the upper valve cover uses an O-ring.

(4) The valve body partition and the shaft hole of the upper valve cover are inlaid with copper sleeves, which can reduce the frictional torque between the valve and the O-ring, making the sealing components flexible in opening and closing and requiring low operating torque.

(5) The upper valve cover is equipped with an indicator plate and limit screws, and a pointer is installed on the valve stem to clearly indicate the connection status of each channel, making it easy to operate.

Rexroth is committed to providing safe, accurate, efficient, and cost-effective transmission and control technologies for various types of machinery and system equipment. The company integrates global application experience to develop innovative products, providing customized system solutions and services for customers in every segment of the mobile machinery, mechanical applications and engineering, factory automation, and renewable energy markets. Bosch Rexroth also provides customers with a wide range of hydraulic, electronic drive and control, pneumatic, gear, linear drive, and assembly technologies. The company operates in over 80 countries worldwide, employing more than 37,500 professionals. In 2012, its global sales reached nearly €6.5 billion.

Business Segments

Mobile Machinery:

Construction machinery, material handling equipment, agricultural and forestry machinery, commercial/highway vehicles

Mechanical Applications and Engineering, Factory Automation:

Motion mechanisms, automotive industry, mining, oil and gas drilling (surface), stage technology, chemical industry, printing and paper processing, energy technology, material handling, glass machinery manufacturing, rubber processing, semiconductor and electronics industry, woodworking industry, horizontal directional drilling rigs, engines, plastics machinery and grinding mills, metallurgy, mining equipment, assembly and loading/unloading, dredgers, offshore engineering, processing and packaging, testing technology, recycling and waste management, marine engineering, motion simulation technology, solar energy, machine tools (cutting), hydraulic engineering, tunnel boring machines, metal forming machine tools and presses, conveying technology, fluid dynamics research, shipyard equipment, cement industry, sugar industry, pulp and paper machinery.

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Our company mainly deals in European and American brands and can purchase brands from any European country. For example, our advantageous German brands include: BURKERT, DEMAG, HAWE, REXROTH, HYDAC, PILZ relays, FESTO, IFM sensors, E+H, HEIDENHAIN, P+F sensors, SICK, TURCK, and HIRSCHMANN industrial switches. German brands: Hengstler, Murr, Schmersal, Samson, EPRO (Emerson Group)

American brands: MOOG, ASCO, MAC, NUMATICS, PARKER, Vickers, Helón (Norgren)

Italian brands: OMAL, ATOS, CAMOZZI, UNIVER, Camozzi