Concrete Iran

concrete mixer pump PV21

The PV21 and PV23 hydraulic pumps, manufactured by Sundstrand, are axial piston pumps designed for high-reliability operation in concrete mixer hydraulic systems. They can be used in both open and closed circuit systems, providing sufficient flow and pressure for heavy-duty concrete mixing. The PV21 has a displacement of 21 cm³ per revolution, while the PV23 displaces 23 cm³ per revolution. Maximum operating pressures reach 350 bar for PV21 and 360 bar for PV23, with maximum flows of 120 and 130 liters per minute, respectively. Each pump weighs approximately 55–60 kg, and the required input power at operational speed is around 100 kW.

The repair process begins with removing the pump from the hydraulic system and inspecting the housing and external connections for leaks or cracks. The cylinder block, pistons, swash plate, and drive shaft are measured using precision tools such as micrometers and gauges. Worn or damaged components are replaced to restore hydraulic performance and flow to factory specifications. All auxiliary components, including seals and O-rings, are also replaced to minimize leakage and prevent future failures.

After reassembly, the pump undergoes comprehensive performance testing. Operating pressure, output flow, input torque, and noise levels are mea

Concrete machine hydraulic pump repair

The REXROTH A4VG concrete mixer boom hydraulic pump is an axial piston variable displacement type, capable of adjusting flow according to load requirements. Its nominal power reaches up to 75 kW, and flow rate ranges between 50 and 180 liters per minute. Maximum operating pressure is 350 bar, and oil temperature is controlled between 40 and 70 degrees Celsius under standard conditions. This pump supplies hydraulic force to lift cylinders and mixer rotation and requires precise monitoring of pressure, flow, and operating temperature.

The repair process includes complete disassembly of the pump body, inspection of the shaft and bearings, and checking pistons and gears. O-rings, seals, and gaskets are commonly replaced. Internal and external leakage tests, volumetric flow measurement, and output pressure verification are performed before and after repair. Adjusting the swashplate angle for accurate flow is essential. Using precision tools and hydraulic test equipment reduces repair errors to less than 2 percent.

Consumable parts include pistons, swashplate, shaft bearings, O-rings, and high-pressure washers. Repair costs depend on part condition and usually range between 25 and 40 percent of the new pump price. After reassembly, the pump is tested at standard pressures of 250â

Concrete pump accumulator

The accumulator used in concrete pumps is typically of the bladder type, designed to withstand working pressures between 250 and 350 bar. Its body is made of high-strength carbon steel with a tensile resistance above 950 MPa and is coated with anti-corrosion protection. The working volume is selected based on the pump’s capacity, usually ranging from 4 to 20 liters. The nitrogen pre-charge pressure is generally set between 90 and 120 bar to maintain hydraulic system efficiency.

The installation location of the accumulator in a concrete pump is on the main hydraulic line, close to the hydraulic pump, where it can absorb pressure surges and flow fluctuations. It is typically mounted near the control valve or directly on the hydraulic manifold, preferably in a vertical position. This installation ensures stable operation during sudden load changes and helps reduce wear on system components.

The capacity of the accumulator is determined by the hydraulic motor power and the pump’s output flow rate. For example, in concrete pumps with a delivery capacity of 60 to 80 cubic meters per hour, a 10-liter accumulator is commonly used. In larger models with outputs above 100 cubic meters per hour, 15- to 20-liter accumulators are applied. Proper capacity selection ensures sufficient

concrete pump

Concrete pump spare parts include delivery cylinders, rubber pistons, shut off valves, transfer pipes, and high pressure elbows operating at working pressures of 80 to 130 bar. Cylinders are typically manufactured from 42CrMo4 alloy steel with induction heat treatment and surface hardness of 58 to 62 HRC. Delivery pipes are produced from wear resistant steel with 4 to 10 mm thickness and tensile strength above 900 MPa. Machining tolerance of critical components is limited to ±0.02 mm to restrict leakage and pressure loss below 3 percent. Pistons are made of reinforced polyurethane with abrasion resistance above 30 mm3 according to ASTM D5963. All components comply with DIN 2391 and ISO 9001 quality control and hydrostatic testing requirements.

In structural design, fatigue resistance is considered for more than 500000 working cycles at flow rates between 60 and 180 cubic meters per hour. Flange and clamp connections withstand pressure shocks up to 1.5 times nominal pressure. Internal pipe lining hardness of 60 HRC increases service life up to 30000 cubic meters of pumped concrete. Sealing is ensured by NBR or FKM rings within temperature range of minus 20 to 120 degrees Celsius. A minimum safety factor of 2.0 against yield stress is applied. Ultrasonic testing and metallurgic

Concrete Pump Parts

Concrete pump parts include hydraulic components, mechanical assemblies, and concrete contact elements designed for operating pressures between 60 and 130 bar. Delivery cylinders are manufactured with internal diameters of 180 to 230 millimeters and strokes from 1400 to 2100 millimeters. Wear plates and cutting rings are produced from high chromium alloy with hardness above 60 HRC. Delivery pipelines are selected with nominal diameters of 100 to 150 millimeters and wall thicknesses of 4 to 7 millimeters. The S valve is made of wear resistant alloy steel with induction hardened depth of 3 to 5 millimeters. Bushings and bearings are machined with dimensional tolerances below 0.05 millimeters.

The hydraulic system includes a piston pump rated at 320 bar with flow rates from 200 to 400 liters per minute. High pressure hoses comply with SAE standards and a minimum 4 to 1 safety factor. Hopper and agitator components are fabricated from wear resistant steel with thicknesses between 6 and 10 millimeters. Service life of consumable parts varies from 500 to 2000 operating hours depending on aggregate grading and mix design. Quality control procedures include hydrostatic pressure testing, leakage inspection, weld examination, and surface hardness measurement. Concrete transfer efficienc

fixed Concrete Pump

A stationary concrete pump is a ground mounted or trailer based concrete delivery unit designed for operating pressures between 60 and 120 bar. Nominal pumping capacity ranges from 30 to 120 cubic meters per hour, with maximum aggregate size up to 40 millimeters. Delivery cylinders are manufactured with internal diameters of 180 to 230 millimeters and strokes from 1400 to 2000 millimeters. The hydraulic system includes an axial piston pump rated at 320 bar and engine power from 55 to 160 kilowatts. The hydraulic tank volume ranges from 400 to 800 liters with air or water cooling systems. The hopper includes an agitator rotating at 20 to 30 rpm to prevent concrete segregation.

The chassis is fabricated from structural steel with minimum yield strength of 355 megapascals and reinforced for dynamic loading. Outlet pipelines with diameters of 100 to 150 millimeters and wall thickness of 4 to 7 millimeters are selected. The control system may be electro hydraulic with industrial PLC and real time pressure monitoring. Volumetric efficiency typically exceeds 85 percent with a design safety factor between 1.5 and 2. Quality control includes hydrostatic pressure testing, 2 to 4 hour continuous performance testing, and sensor calibration. Estimated service life under standard conditions

Concrete Pump Parts

Concrete pump spare parts consist of wear resistant mechanical and hydraulic components designed for operating pressures between 70 and 130 bar. The delivery cylinder is manufactured with an internal diameter of 180 to 230 millimeters and a chrome layer thickness of 0.2 to 0.3 millimeters. Wear plates and cutting rings are produced from high chromium alloy cast iron with hardness ranging from 58 to 64 HRC. The S valve is induction hardened to a depth of 3 to 6 millimeters. Delivery pipelines with diameters of 100 to 150 millimeters are selected with wear resistance above 250 Brinell. Couplings and clamps withstand impact pressures up to 1.3 times nominal pressure.

The hydraulic system includes a piston pump rated at 320 bar with volumetric efficiency above 85 percent. High pressure hoses are selected with a 4 to 1 safety factor and temperature resistance up to 80 degrees Celsius. Bushings and seals are manufactured from polyurethane or NBR rubber with hardness between 70 and 90 Shore A. Fatigue life of wear components varies from 600 to 2500 operating hours depending on concrete mix design. Quality control includes hydrostatic pressure testing, hardness measurement, and dimensional inspection with 0.01 millimeter accuracy. Stable system performance is ensured up to 20000 opera

Concrete Boom Pump Spare Parts

Concrete boom pump spare parts include conveying, distribution, and hydraulic control components designed for working pressures of 80 to 130 bar. Delivery pipelines are manufactured from alloy steel with hardness between 58 and 62 HRC. Wall thickness typically ranges from 4 to 7 millimeters with nominal diameters of 100 to 150 millimeters. Elbows and couplings feature internal wear resistant liners with service life of 30000 to 60000 cubic meters of concrete. Delivery cylinders are produced with internal diameters of 180 to 230 millimeters and strokes from 1400 to 2100 millimeters. The S valve or Rock Valve is made from wear resistant alloy steel with induction heat treatment.

The hydraulic system uses a piston pump with flow rates of 200 to 400 liters per minute and nominal pressure of 320 bar. High pressure hoses comply with SAE 100R2 standard and a 4 to 1 safety factor. Wear plates and cutting rings are produced from high chromium alloy with hardness above 60 HRC. Bearings and bushings are assembled with dimensional tolerances below 0.05 millimeters. Quality control includes hydrostatic pressure testing, leakage inspection, and ultrasonic weld examination. Service life of consumable parts ranges from 500 to 2000 operating hours depending on concrete flow and aggregate ratio

concrete pump

A concrete pump is a unit for concrete delivery and discharge operating at pressures of 60 to 130 bar, available as stationary or mobile. Pumping capacity ranges from 30 to 120 cubic meters per hour, with maximum aggregate size of 40 millimeters. Delivery cylinders are made from wear resistant steel with internal diameters of 180 to 230 millimeters and strokes from 1400 to 2100 millimeters. The S or Rock valve is manufactured from alloy steel with induction heat treatment for high wear resistance. Outlet pipes are selected with diameters of 100 to 150 millimeters and wall thickness of 4 to 7 millimeters. The hydraulic system includes a piston pump rated at 320 bar with flow rates of 200 to 400 liters per minute.

The chassis and subframe are fabricated from structural steel with minimum yield strength of 355 megapascals and reinforced for dynamic loads. High pressure hoses and fittings comply with SAE 100R2 standards with a 4 to 1 safety factor. Quality control includes hydrostatic pressure testing, leakage inspection, and dimensional measurement with 0.01 millimeter precision. Service life of consumable parts varies from 500 to 2000 hours depending on concrete mix and aggregate size. Concrete delivery efficiency exceeds 85 percent under proper maintenance.

concrete pump

A concrete pump is a mechanical and hydraulic unit for concrete delivery operating at pressures from 60 to 130 bar. Pumping capacity ranges from 30 to 120 cubic meters per hour, with maximum aggregate size of 40 millimeters. Delivery cylinders are made from wear resistant steel with internal diameters of 180 to 230 millimeters and strokes from 1400 to 2100 millimeters. The S or Rock valve is manufactured from wear resistant alloy steel with hardness between 58 and 62 HRC. Delivery pipes are selected with diameters of 100 to 150 millimeters and wall thickness of 4 to 7 millimeters. The hydraulic system includes a piston pump rated at 320 bar with flow rates of 200 to 400 liters per minute.

The chassis and base frame are fabricated from structural steel with minimum yield strength of 355 megapascals and reinforced for dynamic loads. High pressure hoses and fittings are selected according to SAE 100R2 standards with a 4 to 1 safety factor. Quality control includes hydrostatic testing, leakage inspection, and dimensional measurement with 0.01 millimeter precision. Service life of consumable parts ranges from 500 to 2000 operating hours depending on concrete type and mix design. Regular maintenance ensures concrete delivery efficiency above 85 percent.

Ground Concrete Pump

The ground concrete pump is a specialized unit for high pressure transfer of fresh concrete in construction and industrial projects. The machine operates with a diesel or electric motor within a power range of 55 to 132 kilowatts. Concrete pumping capacity ranges from 25 to 100 cubic meters per hour depending on project requirements. Maximum system output pressure is approximately 70 to 130 bar, ensuring uniform material flow. The concrete cylinder diameter typically ranges from 200 to 250 millimeters, with piston stroke up to 1800 millimeters. An electrohydraulic control system enhances operational precision and concrete transfer efficiency.

Structurally, the ground concrete pump features a durable steel inlet hopper with an internal wear resistant agitator. An S valve or sliding valve system directs concrete flow without blockage. Delivery pipes are manufactured from high wear resistant alloy steel with diameters of 100 to 150 millimeters. A reinforced chassis with stabilizing supports provides stability under heavy load conditions. Oil cooling and automatic lubrication systems increase component service life. The engineering design complies with international standards to ensure safety and operational efficiency.

concrete pump

Concrete pump spare parts include delivery cylinders, S valves, cutting rings, wear plates, polyurethane pistons, and high pressure delivery pipes. Cylinders are manufactured from 42CrMo4 alloy steel with 55 to 62 HRC surface hardness and surface roughness below Ra 0.4 micrometers. Delivery pipe thickness ranges from 4 to 12 mm with tensile strength above 900 MPa. Assembly tolerance of sealing components is limited to ±0.02 mm to maintain pressure loss below 3 percent. Cutting rings and wear plates are produced from high chromium alloy cast iron with 58 HRC hardness. All components undergo hydrostatic testing at 1.5 times nominal pressure up to 130 bar.

Structurally, wear resistance is designed for more than 20000 to 30000 cubic meters of pumped concrete. Pistons are made of reinforced polyurethane with abrasion loss below 30 mm3 according to ASTM D5963. Clamp and flange connections withstand pressure shocks up to 1.5 times operating pressure. Internal pipe surfaces are induction hardened to a depth of 1.5 to 2.5 mm. A minimum safety factor of 2.0 against base material yield stress is applied. Quality control includes ultrasonic testing, metallurgical analysis, and dimensional inspection according to ISO 9001.

concrete pump

Concrete pump spare parts include hydraulic cylinders, rubber or polyurethane pistons, S valves, cutting rings, wear plates, and high-pressure steel pipes. Cylinders are made from 42CrMo4 alloy steel with induction heat treatment and surface hardness of 58 to 62 HRC. Delivery pipes with 100 to 125 mm inner diameter and 4 to 12 mm thickness have tensile strength above 900 MPa. Polyurethane pistons are designed with abrasion loss below 30 mm3 according to ASTM D5963. Assembly tolerance for critical components is ±0.02 mm to keep system pressure loss below 3 percent. All parts undergo hydrostatic testing at 1.5 times nominal pressure and ISO 9001 quality control.

Structurally, spare parts are designed for at least 500,000 working cycles at flow rates of 60 to 180 cubic meters per hour. Flange and clamp connections withstand pressure shocks up to 1.5 times working pressure. Internal pipe surface hardness of 60 HRC extends service life to 30,000 cubic meters of pumped concrete. System sealing is ensured by NBR or FKM rings within a temperature range of -20 to 120°C. Ultrasonic testing and metallurgical analysis prevent microcracks and verify microstructure. Minimum safety factor against yield stress is 2.0.

fixed Concrete Pump

The ground concrete pump is a high pressure concrete transfer system used for horizontal and vertical delivery of concrete in construction projects. The unit is equipped with a diesel or electric motor with power ranging from 45 to 110 kilowatts. Concrete pumping capacity typically ranges from 30 to 90 cubic meters per hour. System output pressure varies between 60 and 120 bar, ensuring uniform material delivery. The delivery cylinder diameter ranges from 180 to 230 millimeters, with a piston stroke of approximately 1200 to 1600 millimeters. A hydraulic control system improves operational accuracy and concrete flow stability.

Structurally, the unit includes a durable steel hopper with a capacity of 400 to 800 liters and an internal wear resistant agitator. Delivery pipes are made of alloy steel with diameters from 100 to 150 millimeters. An S valve or rock valve system provides continuous flow with minimal blockage. A reinforced chassis and stabilizing supports ensure safe operation under heavy working conditions. Automatic lubrication and multi stage filtration systems extend component lifespan. The design complies with ISO 21573 standards, ensuring operational safety and efficiency.

Concrete Cutting Diamond Blade

A concrete cutting blade utilizes metal-bonded abrasive segments with industrial diamond grit. Diamond concentration ranges from 30/40 to 40/50 mesh with an average density of 35 percent. These segments are laser-welded to a steel core with 350 MPa tensile strength. Standard diameters range from 100 mm to 1200 mm. Blade thickness varies from 2.5 mm to 4.0 mm with a tolerance of ±0.1 mm. The optimal peripheral cutting speed is 50 to 80 meters per second. This blade cuts concrete up to 60 MPa compressive strength, asphalt, and masonry. Its service life reaches 500 square meters in reinforced concrete cutting.

Its construction features a steel core, cutting segments, and cooling slots. The number of segments ranges from 6 to 36 depending on diameter and application. Segment height is typically 10 mm to allow for re-sharpening. The segment attack angle is set between 0 and 15 degrees positive. Laser-cut slots facilitate water flow up to 8 liters per minute. This design maintains the cutting zone temperature below 100 degrees Celsius. High-quality blades feature precise markings for installation and maximum RPM. These markings ensure safety and efficiency in heavy-duty operations.