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Nelson Irrigation Corp.   848 Airport Rd.   Walla Walla, WA  99362-2271 USA   Tel: 509.525.7660    Fax: 509.525.7907   E-mail: [email protected]   Web site: www.nelsonirrigation.com

 

MR/MRDC 

MDC Guide

TECHNICAL APPLICATION GUIDE

FOR MINI-REGULATOR WITH AND WITHOUT DRAIN CHECK OPTIONS

1.0  REGULATING WATER PRESSURE  
 

& DRAIN CHECK

2.0  HOW IT WORKS

3.0  OPERATION DETAILS

 

3.1  MR (mini regulator)

 

3.2   MRDC/MDC drain check function

 

3.3  Low temperature caution

4.0  TYPICAL APPLICATIONS

 

4.1  Rotator orchard sprinkler

 

4.2  Overtree cooling

 

4.3  Drip lines

 

4.4  Rotator for wheel lines

 

4.5  Green house irrigation

5.0  TECHNICAL PERFORMANCE DETAILS

 

5.1  Pressure options

 

5.2  Flow effect on outlet pressure

 

5.3  Performance considerations

 

5.4  Minimal required pressure input

 

5.5  Design considerations 

 

 

of pressure control

 

5.6  Flow limits

 

5. 7  Filtration requirements

6.0  OPTIONAL MODELS

7.0  MATERIAL LIST OF PARTS

WARRANTY

1

TABLE OF CONTENTS

R2000 ROTATOR

®

 

WITH MINI REGULATOR

MRDC-AP   11/14

MR/MRDC/MDC

Summary of Contents for MR

Page 1: ...MDC drain check function 3 3 Low temperature caution 4 0 TYPICAL APPLICATIONS 4 1 Rotator orchard sprinkler 4 2 Overtree cooling 4 3 Drip lines 4 4 Rotator for wheel lines 4 5 Green house irrigation...

Page 2: ...sure is available to irrigate properly 2 0 HOW IT WORKS The mini regulator MR is normally open The water pressure output is regulated By contrast the mini regulator drain check MRDC and mini drain che...

Page 3: ...e regulation 3 2 MRDC MDC DRAIN CHECK FUNCTION The check will not open until minimum pressure is provided to the base of the MRDC and MDC Minimum pressure to open is approximately 13 psi below rated p...

Page 4: ...he quick start up of the sprinklers to rapidly wet the fruit 4 3 DRIP LINES The low pressure operation of drip lines requires exact pressure control Slight variations caused by pump pressure or elevat...

Page 5: ...inimum pressure SPECIAL WARNINGS 1 Always maintain a minimum of 5 PSI above the nominal pressure rating to avoid severe distortion of sprinkler distribution patterns and decreased flow 2 Remove the MR...

Page 6: ...tion of the stream and a poor sprinkler distribution pattern BE ALERT TO PRESSURE EFFECT UPON THE DRAIN CHECK Another unique feature about the MRDC is the difference in opening and closing The graph s...

Page 7: ...available then the regulator works otherwise it remains open Consider the savings for lower demand on pump power because of the reduced initial start up flow surge Some power rates are based upon the...

Page 8: ...tations or warranty not contained herein The Mini Regulator Drain Check is covered by the following U S Patents 5875815 5257646 and other pending US and Foreign Patents 6 0 CONNECTION OPTIONS PART LAB...

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