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SIHI® ZHN, ZDN, ZEN, ZDI Industrial Process Pump
Flowserve Industrial Process Pumps Available to Order

SIHI® ZHN, ZDN, ZEN, ZDI Industrial Process Pump

Superior hot water circulation, up to 230°C (446°F) with a standard un-cooled mechanical seal, gives the unique ability to minimise life-cycle cost. Internal separation and removal of undesirable vapour (steam) enhances mechanical seal face lubrication and improves reliability. High-level hydraulic efficiency ensures that running cost are predictably low.
Flow Rate Up To 600 m³/h (2642 US gpm)
Head Up To 90 m
Max Pressure PN 40 (580 psi)
🔧 NZ-based technical support 📄 Trade pricing on request 🕐 Quotes typically same day

Applications

  • Power
  • Chemicals
  • Water
  • Oil & Gas
  • General Industries

Key Features

  • Temperature max. 230°C (446°F)
  • Low NPSH values
  • Stable wiht temperature fluctations, provision for thermal expansion
  • Back pull out design
  • Un-cooled seal
  • Vapour separation and removal in this unique seal champer
  • Large volume seal champer located at cool drive-end
  • Long life due to anti-friction bearing

Technical specifications

View full specification table
Brand SIHI®
Model SIHI® ZHN, ZDN, ZEN, ZDI
Equipment Category Industrial Process Pump
Sizes From 32 mm (1.25 in) to 150 mm (6 in)

Frequently asked questions

What is the difference between ZHN, ZDN, ZEN and ZDI pumps?
ZHN, ZDN and ZEN are long-coupled, bare-shaft designs for progressively higher hot-water temperatures and pressures. ZDI is a compact inline design for direct installation into pipework.
What temperature can SIHI ZHN, ZDN, ZEN and ZDI pumps handle?
ZHN handles temperatures up to 180°C, ZDN up to 207°C, ZEN up to 230°C and ZDI up to 150°C. Contact us to confirm the appropriate model for your operating temperature.
How does the range handle temperature fluctuations?
The pumps are designed to remain stable through temperature fluctuations and include provision for thermal expansion.
How do I choose the right SIHI ZHN, ZDN, ZEN or ZDI pump?
Selection depends on the required flow, head, operating temperature and pressure, pipework layout, available space and service requirements. Contact us and we can help identify a suitable configuration.

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