Vickers material handling truck gear pump
Vickers Piston Pump for Pipeline Forming Equipment: Models & Parameters
1. Overview
This document details the models, key parameters, technical specifications, product features and application notes of Vickers piston pumps specially designed for pipeline forming equipment. Pipeline forming equipment (including pipe bending, pipe expanding, pipe flanging, and pipe welding auxiliary equipment) requires high-pressure, stable and continuous hydraulic power output, and Vickers piston pumps are optimized for this scenario with excellent pressure resistance, low leakage, and strong adaptability to harsh working conditions. These pumps are core components of the hydraulic system of pipeline forming equipment, ensuring precise control of forming processes and improving equipment efficiency and product quality.
2. Applicable Series and Model Designation
Vickers piston pumps suitable for pipeline forming equipment mainly include the PVQ series (variable displacement piston pump) and PVB series (fixed displacement piston pump), which are widely used due to their compact structure, high efficiency and reliable performance. The model designation follows Vickers’ unified industrial standard, with detailed explanations combined with typical examples.
2.1 PVQ Series (Variable Displacement Piston Pump)
The PVQ series is a variable displacement axial piston pump, which can adjust the displacement according to the pressure demand of pipeline forming equipment, achieving energy saving and precise pressure control. A typical model example is as follows:
Example: PVQ40-B2R-SE1S-20-C21-12
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PVQ: Vickers PVQ series variable displacement piston pump base code
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40: Frame size (determines the maximum displacement and pressure capacity)
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B: Control type (B = pressure-compensated control, suitable for pipeline forming equipment with variable pressure demand)
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2R: Rotation direction (2R = clockwise rotation viewed from the shaft extension end, standard)
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SE1S: Mounting and port connection specification
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20: Shaft extension specification (complies with ISO 3019/2 standard)
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C21: Seal type (C21 = standard nitrile rubber seal, suitable for petroleum-based hydraulic oil)
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12: Design number
Note: For pipeline forming equipment requiring remote pressure adjustment, the control type can be selected as “E” (electro-hydraulic proportional control) to achieve automatic pressure regulation.
2.2 PVB Series (Fixed Displacement Piston Pump)
The PVB series is a fixed displacement axial piston pump, featuring simple structure, high reliability and low maintenance cost, suitable for pipeline forming equipment with stable pressure and flow demand (such as fixed-specification pipe bending machines). A typical model example is as follows:
Example: PVB10-RS-20-C-11
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PVB: Vickers PVB series fixed displacement piston pump base code
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10: Frame size (corresponding to fixed displacement range)
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RS: Mounting type (RS = foot mounting, standard for pipeline forming equipment)
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20: Shaft extension specification
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C: Port position (C = standard upward port, suitable for equipment hydraulic circuit layout)
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11: Design number
Note: When using water-based hydraulic oil or special fluids for pipeline forming equipment in harsh environments, the seal type can be replaced with fluororubber (model suffix modified to “F”).
3. Models and Key Parameters
All parameters listed below are under standard operating conditions: petroleum-based anti-wear hydraulic oil (ISO VG 46), operating temperature of 50°C, and standard atmospheric pressure. These parameters are optimized for pipeline forming equipment, ensuring stable operation during long-term continuous work.
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Series
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Type
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Displacement Range (cm³/rev)
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Max Rotation Speed (r/min)
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Max Operating Pressure (bar)
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Standard Weight (kg)
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Recommended Shaft Speed Range (r/min)
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Applicable Pipeline Forming Process
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PVQ40
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Variable Displacement Piston Pump
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10–40
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1800
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350
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38
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800–1800
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Pipe bending, pipe expanding, flanging (variable pressure demand)
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PVQ32
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Variable Displacement Piston Pump
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8–32
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1800
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350
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32
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800–1800
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Small-diameter pipe forming, precision pipe bending
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PVB10
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Fixed Displacement Piston Pump
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10 (fixed)
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2000
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315
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15
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1000–2000
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Fixed-specification pipe bending, pipe welding auxiliary
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PVB20
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Fixed Displacement Piston Pump
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20 (fixed)
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2000
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315
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22
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1000–2000
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Medium-diameter pipe forming, continuous pipe expanding
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Common model examples for pipeline forming equipment include (but are not limited to): PVQ40-B2R-SE1S-20-C21-12, PVQ32-B2R-SE1S-20-C21-12, PVB10-RS-20-C-11, PVB20-RS-20-C-11.
4. Additional Technical Parameters
4.1 Suction Pressure Requirements
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Minimum suction pressure: -15 kPa (absolute pressure) for shaft speeds below 1700 r/min; 0 kPa for shaft speeds above 1700 r/min, to avoid cavitation during high-speed operation of pipeline forming equipment.
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Maximum suction pressure: 10 kPa (absolute pressure), preventing excessive suction pressure from damaging the pump inlet seal.
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The suction line should be as short as possible, with a diameter not smaller than the pump inlet diameter, to reduce suction resistance and ensure stable oil supply during continuous forming operations.
4.2 Hydraulic Fluid Requirements
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Recommended fluids: Petroleum-based anti-wear hydraulic oil (ISO VG 32/46/68); ISO VG 46 is the most suitable for pipeline forming equipment, balancing viscosity and lubrication performance.
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Viscosity limits: Maximum 160 mm²/s (720 SSU) at startup; maximum 100 mm²/s (455 SSU) during normal operation; optimal viscosity range is 25–45 mm²/s.
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Fluid temperature range: 15°C to 65°C (long-term continuous operation); when the equipment works continuously for more than 8 hours, a cooling system should be installed to prevent oil temperature from exceeding 70°C, which will accelerate seal aging and pump wear.
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Fluid cleanliness: ISO 4406 Class 16/13 (NAS 8), requiring a high-precision filter (5 μm) in the return line to prevent metal debris generated during pipeline forming from entering the pump and causing internal component wear.
4.3 Pipe Connection and Mounting
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PVQ Series: Suction port G3/4 (BSP thread), discharge port G1/2 (BSP thread); mounting type is foot mounting (standard) or flange mounting (optional), compatible with most pipeline forming equipment frames.
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PVB Series: Suction port G1/2 (BSP thread), discharge port G3/8 (BSP thread); foot mounting (RS type) is standard, with flange mounting available for compact installation spaces.
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Shaft extension: Complies with ISO 3019/2, with a keyway design to ensure stable power transmission, matching the motor of pipeline forming equipment.
4.4 Seal and Material Specifications
Standard seals are nitrile rubber (NBR), suitable for petroleum-based hydraulic oil. For pipeline forming equipment working in humid or corrosive environments, fluororubber (FKM) seals can be selected to improve corrosion resistance. The pump cylinder block and plunger are made of high-strength alloy steel, with surface hardening treatment, ensuring wear resistance and long service life under high-pressure working conditions of pipeline forming.
5. Product Features for Pipeline Forming Equipment
5.1 PVQ Series (Variable Displacement)
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Precise pressure control: Pressure-compensated control can automatically adjust displacement according to the forming pressure demand, reducing energy consumption and avoiding pressure overshoot, which is suitable for pipe bending and expanding processes that require variable pressure.
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High pressure resistance: Maximum operating pressure up to 350 bar, meeting the high-pressure demand of thick-walled pipe forming and large-diameter pipe expanding.
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Low noise: Optimized plunger and valve plate structure reduces operational noise, adapting to the workshop environment where pipeline forming equipment is concentrated.
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Long service life: Wear-resistant materials and precise manufacturing ensure stable operation for more than 8000 hours under continuous working conditions of pipeline forming equipment.
5.2 PVB Series (Fixed Displacement)
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High reliability: Simple structure, few wearing parts, low failure rate, suitable for pipeline forming equipment that requires long-term continuous operation (such as automatic pipe production lines).
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High efficiency: Fixed displacement design with low internal leakage, ensuring high hydraulic system efficiency and reducing energy loss of pipeline forming equipment.
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Compact and lightweight: Small volume and light weight, facilitating installation in the limited space of pipeline forming equipment.
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Low maintenance cost: Simple disassembly and assembly, easy replacement of wearing parts, reducing the maintenance cost of pipeline forming equipment.
6. Operational Notes for Pipeline Forming Equipment
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Before starting the pump, fill the pump cavity with hydraulic oil to avoid dry running, which will cause instantaneous overheating and damage to the plunger and cylinder block.
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Check the hydraulic oil level, temperature and cleanliness before each use of the pipeline forming equipment to ensure the pump works under standard conditions.
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During the pipeline forming process, avoid sudden pressure changes, which will cause impact on the pump and reduce its service life; the pressure adjustment should be gradual.
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Regularly check the pump’s oil leakage and noise; if abnormal leakage or excessive noise is found, stop the equipment immediately for inspection to avoid further damage.
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Replace the hydraulic oil and filter element regularly (every 2000 hours of operation) to ensure the cleanliness of the hydraulic oil and prevent abrasive particles from damaging the pump’s internal components.
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When replacing the pump or seals, select the correct model and seal material according to the pipeline forming equipment’s working conditions and hydraulic fluid type.
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For PVQ series variable displacement pumps, regularly check the pressure compensation valve to ensure its normal operation, so as to realize precise pressure control of the pipeline forming process.
