Pumps for High System Pressures

The high-pressure version of our standard pumps features a robust bolted-together housing design rated for system pressures up to PN 160. This design enables reliable use in process applications with high discharge pressures and demanding operating conditions.

ADVANTAGES
The bolted housing design ensures maximum pressure resistance while also facilitating easy maintenance. Thanks to the modular design, wear parts can be replaced directly without having to disassemble the entire pump. This results in shorter downtime and lower maintenance costs. The high-pressure version is ideal for membrane filtration systems, particularly for reverse osmosis applications where consistently high pressures are required. At the same time, this version is suitable for chemical plants and process engineering applications where the fluid must be pumped under high pressure.

LIMITATIONS
The high-pressure housing design is optimized for constant high pressures. Under pulsating or highly fluctuating pressure loads, fatigue damage may occur on the housing. In addition, the bolted construction requires regular inspection of the bolted joints for leaks, particularly in processes involving aggressive or highly viscous fluids.

POSSIBLE APPLICATIONS

• Membrane filtration systems: reverse osmosis, nanofiltration, and ultrafiltration with operating pressures up to PN 160.
• High-pressure metering and pumping processes: Reliable pumping under consistently high pressures in the chemical and process industries.
• Systems with high suction pressures: Processes requiring a pressure increase at the pump inlet, such as vacuum condensate systems or deep well pumping.
• Specialty chemicals and corrosive media: The robust housing design provides additional safety when handling chemically aggressive fluids.
• Processes with temperature fluctuations: The bolted construction withstands rapid temperature changes better than cast housings.

MONITORING OPTIONS FOR HIGH-PRESSURE PUMPS

• Pressure monitoring at the pump discharge and, optionally, in the suction line
• Motor monitoring via a PTC thermistor and/or current-limiting fuse
• Temperature monitoring on the housing or the fluid using a PT100
• Vibration monitoring (important at high discharge pressures)
• Dry-run protection via differential pressure switch or flow monitoring
• Monitoring of bolting torques in the maintenance log

AVAILABLE PUMP TYPES WITH HIGH-PRESSURE HOUSINGS

• LE Series: LEH130, LEH150, LEH170, LEH190, LEH190B
• LE Type with magnetic coupling: LEMH130, LEMH150, LEMH170, LEMH190, LEMH190B ZA/ZAL Type: ZAH21, ZAH21B, ZALH21, ZALH21B
• ZA/ZAL type with magnetic coupling: ZAM21H, ZAM21BH, ZALM21H, ZALM21BH
• Type MP: MPH68, MPH73, MPH78, MPH92

HIGH-PRESSURE PUMP CONFIGURATION OPTIONS

• Magnetic coupling for hermetically sealed design at PN 160 (LEMH, ZAM-H, ZALM-H variants)
• Inducer for low NPSHa values (＜1 m) in LE and ZA/ZAL variants
• Temperature ranges from minus 30°C to 200°C
• Residual drainage in the pump body or pump cover
• High-temperature elastomers for processes up to 200°C (SIP-compatible)
• Surface finish down to Ra ＜0.4 μm for pharmaceutical and cleanroom requirements
• Pressure relief valves and pressure equalization devices
• Customized fittings and sealing materials for specific chemicals