OSMOTEC "LS 100 - 1500"

Foreword

The "OSMOTEC LS" reverse-osmosis systems is used to demineralize water supplies and well waters with a low saline content (maximum T.D.S. of 1,5000 mg/l). It is different from the ion-exchange resin systems as it does not require the use of acid and sodium carbonate (which result in problems in treating the regeneration eluates); they offer long-lasting reliability, and running them proves extremely simple. The "OSMOTEC LS" systems require pretreatment, which is often limited to the addition of a certain amount of sequestrant in order to maintain the calcium carbonates and sulphates in solution, to keep the membrane from being dirtied. The rates of flow and the characteristics of the water produced may vary according to a number of parameters of the water supply (temperature, T.D.S., etc.).
Under standard conditions of use (featured in the relevant table), the conductivity of the water produces is always lower than 20 microsiemens/cm.

Structural features and componentry

"OSMOTEC LS" Mod. 100 - 1500

• Plastic solenoid valve (supply: 24V);
• nº2 gauges with scale 0-6 bar with brass connections.
• nº2 gauges with scale 0-25 bar with brass connections.
• Micron filter with ABS head complete with polypropylene coiled thread cartridge with filtering level of 5 microns.
• Minimum pressure switch positioned on the light-pressure pump's suction inlet with stainless steel connections.
• Maximum pressure switch positioned on the high-pressure pump's delivery outlet with stainless steel connections.
• Motor-driven high-pressure pump, multistage vertical centrifugal type, in AISI 304 stainless steel (for the LS100 model, the high-pressure pump is a displacement-type vane pump in brass).
• AISI 316 (400 PSI) stainless steel vessel; for the vessel is in PRFV (300 PSI).
• Spiral-wound-type osmotic modules
• Needle valve in AISI 316 stainless steel positioned on the concentrate recirculation line;
• Needle valve in AISI 316 stainless steel positioned on the concentrate discharge line;
• By-pass ball valve in AISI 316 stainless steel on concentrate discharge;
• Direct-reading flowmeter with PVC connections for measuring the rate of flow of the permeate;
• Direct-reading flowmeter with PVC connections for measuring the rate of flow of the concentrate.
• Direct-reading conducivity meter powered at 24V, complete with conducivity probe.
• Low-pressure lines with PVC pipes and pipe fitting (for the LS 100 model, the pipes and the pipe fittings are in flexible polyethylene).
• High-pressure lines with high-resistance thermoplastic pipes and pipe fittings complete with AISI 316 stainless steel pipe fittings to be clamped (for the model LS 100 the pipes and pipe fittings are supplied in nylon).
• Electric control board complete with supports;
• Painted carbon steel support skid

  Note

Output conducivity: less than 20 micro S/cm.
The hourly production and the conducivity refer to
the operation of the system after three years with
suitable pretreatment and with the following
conditions used as reference.

1. saline content of the raw water TDS=15000 mg/l.
2. temperature of the water supply: 15ºC
3. min./max. pressure of the water supply: 3/5 bar
4. output pressure of the permeated fluid: 1 bar
5. SDI:<3.
6. iron and manganese content respectively: less than 0.05 mg/l.
7. free chlorine: absent.

The type of pretreatment and any post-treatment must be chosen case by case based on the characteristics of the water to be treated and the use the product is intended for.
The pretreatment must nonetheless be such as to assure the solubility of the calcium carbonates and sulphates in the concentrate.

GENERAL CHARACTERISTICS