Keensen ULP-2521 Ultra Low-Pressure RO Membrane

Keensen ULP-2521 Ultra Low-Pressure RO Membrane

$148.00
$148.00 $198.00
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Keensen ULP-2521 Ultra Low-Pressure RO Membrane
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Product Snapshot

Product Type Ultra Low-Pressure RO Membrane

Compact commercial-grade RO element

Model ULP-2521

Standard 2.5" × 21" membrane format

Membrane Area 14 ft² / 1.3 m²

Active membrane surface area

Permeate Flow 400 GPD / 1.5 m³/day

Under standard test conditions

Salt Rejection 99.2% stable

99.0% minimum rejection rate

Applications Compact RO systems

Commercial, laboratory and dispenser use

Need help confirming compatibility?

Send us your existing membrane model, RO vessel size, system flow rate, feedwater source, TDS level and delivery postcode. Crystwater can help confirm whether the ULP-2521 is suitable for your replacement, compact RO system or small commercial application.

Replacement matching Small system supply Bulk order support
Bulk / Technical Enquiry

For resellers, installers and maintenance teams, include your required quantity and delivery postcode for bulk order and freight support.

Keensen ULP-2521 Ultra Low-Pressure RO Membrane

Keensen ULP-2521 Ultra Low-Pressure RO Membrane

Compact 2.5" × 21" ultra low-pressure RO membrane element for commercial, light industrial and compact reverse osmosis systems.

Designed for reliable salt rejection at lower operating pressure, the Keensen ULP-2521 is suitable for compact RO systems, direct drinking equipment, automatic water dispensers, medical laboratory pure water machines and small desalination devices where the system design, pressure vessel and feedwater conditions match.

Compact 2521 Format 400 GPD Permeate Flow Ultra Low-Pressure Operation Light Commercial RO Systems
SKU: CW-RO-ULP-2521
$148.00
$148.00 $198.00

For multiple membranes, reseller supply or compact RO system maintenance, contact us before ordering for bulk pricing and freight support.

Bulk / Technical Enquiry
✓
Compact 2521 Membrane Format Standard 2.5" × 21" RO membrane element for compatible compact commercial and light industrial RO systems.
✓
Ultra Low-Pressure Operation Designed to deliver efficient RO performance at lower operating pressure, helping reduce system energy demand where the system is correctly designed.
✓
Commercial-Grade TFC Construction Advanced polyamide thin-film composite membrane technology provides reliable salt rejection and long-term performance under suitable operating conditions.
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Replacement & Bulk Supply Support Crystwater supports resellers, installers and maintenance teams with replacement matching, bulk orders and local Australian supply.
Product Overview

The Keensen ULP-2521 is a compact 2.5" × 21" ultra low-pressure reverse osmosis membrane element designed for commercial, light industrial and compact RO systems.

Built with polyamide thin-film composite membrane technology, the ULP-2521 provides reliable salt rejection, stable permeate flow and efficient operation at lower operating pressure compared with conventional RO membrane elements.

This membrane is suitable for automatic water dispensers, direct drinking equipment, office RO systems, medical laboratory pure water machines, compact commercial RO units and small desalination devices where the pressure vessel, feedwater quality and operating conditions are compatible.

Crystwater supplies the ULP-2521 for direct online purchase in Australia, with technical matching support available for installers, resellers, maintenance teams and small commercial RO system operators.
Specifications

Model: ULP-2521

Membrane type: Ultra low-pressure reverse osmosis membrane

Membrane material: Polyamide thin-film composite, TFC

Nominal size: 2.5" × 21"

Active membrane area: 14 ft² / 1.3 m²

Concentrate channel spacer: 28 mil

Permeate flow: 400 GPD / 1.5 m³/day

Stable rejection rate: 99.2%

Minimum rejection rate: 99.0%

Typical application: Compact commercial RO systems, water dispensers, direct drinking systems, laboratory pure water machines and small desalination devices
Standard Test Conditions

Standard test conditions include:

  • NaCl concentration: 1,500 mg/L
  • Temperature: 25°C
  • pH value: 7.5–8.0
  • Operating pressure: 150 psi / 1.03 MPa
  • Recovery rate: 8%
  • Permeate flow tolerance: ±15% for a single membrane element

Engineering note: Performance values are based on standard membrane test conditions. Actual system performance may vary depending on feedwater quality, temperature, pressure, recovery rate, pretreatment condition and system design.
Operating Limits & Conditions

Operating limits and conditions include:

  • Maximum working pressure: 600 psi / 4.14 MPa
  • Maximum feedwater temperature: 45°C
  • Maximum feedwater SDI15: 5.0
  • Maximum feedwater flow: 1.4 m³/h
  • Free chlorine concentration in feedwater: 0.1 mg/L
  • pH range during continuous operation: 3–10
  • pH range during chemical cleaning: 1–13
  • Maximum pressure drop of single membrane element: 15 psi / 0.1 MPa

Engineering note: RO membranes are sensitive to oxidants, suspended solids, scaling and biological fouling. Suitable pretreatment, chlorine control, SDI control and correct operating conditions are required for stable membrane performance and service life.
Typical Applications

Typical applications include:

  • Automatic water dispensers in residential areas, schools and shared facilities
  • Office direct drinking water equipment
  • Commercial drinking water RO systems
  • Medical laboratory pure water machines
  • Compact commercial RO systems
  • Small desalination devices
  • Light industrial process water pretreatment
  • Replacement membrane supply for installers and maintenance teams
  • Small OEM RO system assembly
RO Membrane Selection Guide

Do not select a 2521 RO membrane by size alone.

Before ordering, confirm:

  • Existing membrane model
  • Pressure vessel size
  • System flow rate
  • Feedwater TDS
  • Operating pressure
  • Recovery rate
  • Pretreatment condition
  • Chlorine removal
  • SDI or fouling risk
  • Required permeate water quality

The ULP-2521 is best suited to compact commercial and light industrial RO systems that are designed for 2.5" × 21" membrane elements and ultra low-pressure operation.

If you are replacing an existing membrane, send Crystwater the current membrane model, system photo, vessel size and feedwater information before ordering.
Shipping, Bulk Orders & Support

AU local stock available for fast dispatch.

Crystwater supports:

  • Online direct purchase
  • Reseller and installer supply
  • Bulk order enquiries
  • Replacement matching
  • Compact RO system maintenance supply
  • Freight planning for Australian delivery

For multiple membranes, trade supply or project orders, contact Crystwater with the required quantity, delivery postcode and expected timing.

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