EWP-USA RO Systems and Components

       Your source for Commercial and Industrial RO Systems & Components

PTROM Series

Options and Upgrades   

Request stock and pricing information:.

¹Maximum permeate rate listed at temperature 77°F, Permeate rate can be reduced by 20% as temperature drops.

²Design flow rate of the pump is the sum of Feed rate and Concentrate recycle rate 

Membrane and housing

  • Membrane model: LP22-8040
  • Membrane manufacturer: Vontron
  • Membrane rejection: 97-99%
  • Housing:                                       FRP, 300psi, side port                     (for ≤ 1000ppm)                           FRP, 450psi, side port                           (for ≤ 2500ppm)

Boost pump

  • Type: vertical multi-stage centrifugal
  • Pump material: SS304 (for ≤ 500ppm)                      : SS316 (for ≤ 1000ppm)                     : SS316 (for ≤ 2500ppm)
  • Connection: DIN Flange
  • Pump brand: CNP

Electrical valve

  • Feed valve: UPVC
  • Flush valve: SS316


  • Flow meters: permeate, concentrate, concentrate recycle
  • Conductivity: permeate
  • Pressure gauge: pre-filter, post-filter, pump discharge, concentrate
  • Pressure switch: feed, RO membrane inlet

PTROM Series Reverse Osmosis System        

Material of construction

  • High - pressure piping: SS304 (for ≤ 500ppm)
                                   : SS316 (for ≤ 1500ppm)
                                   : SS316 (for ≤ 2500ppm)
  • Low - pressure piping: UPVC 
  • Frame: SS304
  • Control box: IP54

Connection port

  • Feed inlet port
  • Permeate port
  • Drain port
  • Clean-in-place (CIP) ports

Documentation included

  • Operation and maintenance manual
  • Drawings: P&ID, electrical diagram

Control system

  •    Siemens PLC
  •  Weinview HMI
  •  Parameter setting panel
  •  Tank level control
  •  Low pressure/High pressure protection
  •  Auto flush
  •  Pretreatment lockout control backup

Reverse Osmosis Systems from 3.5m3/h to 10m3/h

Operating Limits

Maximum Feed Temperature:   95°F                                                  pH (Continuous):  4 ~ 9
Minimum Feed Temperature:   41°F Minimum                                     pH (Continuous):  4
Maximum Feed Pressure:  72 psi                                                       Free Chlorine:  Undetectable
Minimum Feed Pressure:  29 psi                                                        Iron:  ppm  <0.1
Maximum TDS:   ppm  1500                                                             Manganese:  ppm  <0.05
SDI:  <5                                                                                         Organic matter:  ppm  <1

PTROM Series

The smart, clean, and practical industrial design of EWP-USA's PTROM Series allows for convenient installation, user-friendly operation, and ease of maintenance. These skid-mounted, packaged systems are pre-plumbed and pre-wired complete on a steel frame with panel-mounted pressure and flow instrumentation allowing for straight forward system monitoring and control. EWP-USA offers an assortment of both basic and premium designs of pure water systems that can be private labeled or customized.


Municipal, Waste water, Hotel, Military,

Hospital, Food and beverage, Pharmaceutical,

Mining, Power and energy, Refinery, Restaurants,

Agriculture, Boiler feed, Disaster relief, and etc.

(Feed TDS < 2500 ppm).

  • PLC controller
  • Feed water conductivity meter
  • pH and ORP meter
  • Grundfos/Danfoss pump
  • Dow/Hydranautics/Toray membrane
  • Easy access remote control
  • Flow transmitter with pulse signal output
  • Pressure transducer with analog signal output
  • Communication: Modbus RTU
  • SS304/316 seamless housing
  • Antiscalant dosing system
  • Clean-in-place (CIP) system
  • Pretreatment system


  • Fully equipped and customizable   
  • Individually tested and preserved
  • Expandable and skid mounted     
  • Low operation and maintenance costs
  • Components are easily accessible 
  • Easy maintenance and servicing
  • Pre-plumbed, wired and assembled  
  • 1-year limited warranty