Emerson Fisher LR125 - Type LR125 Specifications; Type LR125 Construction Materials

Type LR125
2
Specications
Specications for the Type LR125 regulator are shown below. Other information for the main valve appears on the
nameplate. The control spring range for the pilot is marked on the nameplate of Type MR95H/MR95HP pilot.
Main Valve Body Sizes, End Connection Styles
and Structural Design Ratings
(1)
See Table 1
Maximum Inlet Pressures
(1)
Type LR125 Main Valve: See Table 1
Type MR95H/MR95HP Pilot: See Table 2
Type 112 Restrictor: 1500 psig / 103 bar
Outlet (Control) Pressure Ranges
See Table 3
Main Valve Plug Travel
1 in. / DN 25: 0.37 in. / 9.4 mm
2 in. / DN 50: 0.68 in. / 17 mm
3 in. / DN 80: 0.98 in. / 25 mm
4 in. / DN 100: 1.19 in. / 30 mm
Main Valve Minimum Di󰀨erential Pressures
(1)
See Table 6
Main Valve Internal Inlet Strainer Sizes
1 in. / DN 25:
12 Mesh (0.0661 in. / 1.68 mm)
(2)
2, 3 and 4 in. / DN 50, 80 and 100:
10 Mesh (0.0787 in. / 2 mm)
(2)
Temperature Capabilities
(1)
See Table 4
Pressure Registration
1/2 NPT External
Spring Case Vent
Type Y602-12
Construction Materials
Type LR125 Main Valve
Body: WCC Steel, CF8M or CF3M Stainless steel
Bonnet: LF2 Steel or 316/316L Stainless steel
Type LR125 Main Valve (continued)
Bonnet Bushing: Stainless steel
Cage: Stainless steel
Spring: Stainless steel
Top Plug: Stainless steel
Bottom Plug: Stainless steel
Internal Inlet Strainer: Stainless steel
Diaphragm: Nitrile (NBR) or Fluorocarbon (FKM)
O-rings: Nitrile (NBR) or Fluorocarbon (FKM)
Flanged Locknut: Stainless steel
Backup Rings: Polytetrauoroethylene (PTFE)
Upper Spring Seat: Stainless steel
Indicator Protector and Cover: Plastic
Indicator Stem: Stainless steel
Indicator Fitting: Stainless steel
Travel Indicator Plug: Stainless steel
Type MR95H/MR95HP Pilot
Body: WCC Steel or CF8M Stainless steel
Spring Case: WCC Steel or CF8M Stainless steel
Orice: Stainless steel
Diaphragm: Neoprene (CR) or Fluorocarbon (FKM)
Disk: Nitrile (NBR) or Fluorocarbon (FKM)
Mounting Parts
Pilot Mounting Pipe Nipple: Plated steel or
Stainless steel
Pipe Fittings: Plated steel or Stainless steel
Tubing: Stainless steel
Type 112 Restrictor
Body: 15-5 Stainless steel
Groove Valve: Stainless steel
Retainer: Stainless steel
Pipe Plug: Stainless steel
O-rings: Nitrile (NBR) or Fluorocarbon (FKM)
Options
• Pre-piped Pilot Supply
• Travel Indicator
1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
2. Nominal sieve opening
Introduction
Scope of the Manual
This instruction manual provides installation, startup,
adjustment, maintenance and parts ordering information
for Type LR125 pressure reducing regulator, 1/2 NPT
Type MR95H/MR95HP pilot and Type 112 restrictor.
Product Description
The Type LR125 pilot-operated, pressure reducing
regulator is used for liquid applications and include
a Type 112 restrictor and a 1/2 NPT Type MR95H/
MR95HP pilot.