CSM RE1812-35

Summary

Product Identification

This document describes residential reverse-osmosis (RO) elements, specifically 1.8-inch diameter models designed for residential use.

General Features:

• Membrane type: Thin-Film Composite
• Membrane material: Polyamide (PA)
• Element configuration: Spiral-Wound, Tape Wrapping

Performance Specifications

The stated product performance is based on data taken after 30 minutes of operation at the following test conditions:

• 200 mg/L NaCl solution
• 60 psig (0.41 MPa) applied pressure
• 15% recovery
• 77 °F (25 °C)
• pH 6.5–7.0

Model: RE1812-35

• Permeate Flow Rate: 35 GPD (132 L/day)
• Salt Rejection: 98.0%

General Performance Notes:

• Minimum salt rejection is 96.0%.
• Permeate flow rate for each element may vary but will be no more than 15%.
• Dry type elements are vacuum leak tested using the San Diego Protocol.

Operating Limits

• Max. Operating Pressure: 125 psi (0.86 MPa)
• Max. Feed Flow Rate: 2 gpm (0.45 m³/hr)
• Max. Operating Temperature: 113 °F (45 °C)
• Operating pH Range: 2.0–11.0
• Max. Turbidity: 1.0 NTU
• Max. SDI (15 min): 5.0
• Max. Chlorine Concentration: < 0.1 mg/L

Mechanical / Hydraulic

Dimensions for RE1812-35:

• A: 0.67 inches (17 mm)
• B: 0.87 inches (22 mm)
• C: 11.73 inches (298 mm)
• D: 0.98 inches (25 mm)
• E: 1.77 inches (45 mm)

All measurements are in inches with millimeter equivalents.

Handling Procedures

• Elements must be kept dry at room temperature (7–32°C; 40–95°F) and should not be stored in direct sunlight.
• If the polyethylene bag is damaged, a new preservative solution (sodium bisulfite) must be added and air-tight sealed.
• Permeate from the first hour of operation should be discarded to flush out the preservative solution.
• Elements should be immersed in a preservative solution during storage, shipping, and system shutdowns to prevent biological growth and freezing. Standard storage solution contains 1% by weight sodium bisulfite or sodium metabisulfite (food grade). For short-term storage (one week or less), 1% by weight sodium metabisulfite solution is adequate.
• Keep elements moist at all times after initial wetting.
• Only use chemicals compatible with the membrane elements and components; incompatible chemical use may void the limited warranty.
• Permeate pressure must always be equal to or less than the feed/concentrate pressure. Damage caused by permeate back pressure voids the limited warranty.
• Dry elements are packaged in a polyethylene bag.
• Wet elements are packaged in a polyethylene bag containing SB (4g/L) + HCl (0.51g/L) solution.

Certifications

The RE1812-35 model is tested and certified under NSF/ANSI standard 58, material requirement only.

---

Disclaimer: This summary is based on the provided text extract. The original PDF datasheet may contain additional figures, footnotes, or more recent revisions. For contractual data, always refer to the specific OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet