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View Flow Metering Valves for
Flow Metering Valves

187 Restrictor Check Valve

This miniature restrictor check valve is only 0.187 inches in diameter and 0.77 inches in length. This valve provides restricted flow in one direction and prevents flow in the other direction. Restriction rates are available from 1000 to 10,000 Lohms.

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Key Product Facts
  • Ball-Style Restrictor Check Valves
  • Diameter:0.187 inches
  • Metered Lohm Rates:1000-10,000 Lohms
  • Operating Pressures:Up to 3000 psi
  • Leakage:1 drop / hour at 3000 psi
For More Information

Product Information

General Performance
Characteristic Specification
Metered Lohm Rate Tolerance ± 5% or ± 10%
Maximum Leakage in Checked Direction at 5 psid 1 Drop / Minute
Maximum Leakage in Checked Direction at 1000-3000 psid 1 Drop / Hour
Metered Lohm Rate Range 1000 - 10,000 Lohms
Nominal System Pressure Up to 3000 psi
Nominal Weight 2.7 grams
Available Screen Hole Size See Part Number Table
Test Fluid MIL-PRF-83282 at 85°F
Materials
PART MATERIAL SPECIFICATION
Body 303 CRES QQ-S-763C
Pin 303 CRES QQ-S-763C
Cage 303 CRES QQ-S-763C
Ball Follower 303 CRES QQ-S-763C
Spring 17-7PH CRES AMS 5678
Ball 440C CRES AMS 5630
Screen (Screened Version Only) 304L CRES ASTM A 666
Braze (Screened Version Only) — AMS 4774
Finish: All CRES parts passivated.
Pins are prewaxed. Do not degrease. Do not lubricate.
Cross Section Views
Metered Flow Forward Configuration
Dimensional View
This image is for reference only. All dimensions are in inches.
Installation Hole Details
This image is for reference only. All dimensions are in inches.

Part Numbers & Specifications

This table below contains the part numbers and technical specifications for this product. If you have specific questions, need a quote, or would like to request a handbook or drawing, click the red request button in the column on the far right.

Part Numbers & Specifications
PART NUMBER METERED FLOW DIRECTION METERED LOHM RATE TOLERANCE NOMINAL HOLE SCREEN SIZE
(inches) 		Request Information
RCFA1875100D Forward 1000 Lohms ± 5% 0.008 Request
RCFA1875150D Forward 1500 Lohms ± 5% 0.008 Request
RCFA1875200D Forward 2000 Lohms ± 5% 0.008 Request
RCFA1875250D Forward 2500 Lohms ± 5% 0.008 Request
RCFA1875300D Forward 3000 Lohms ± 5% 0.008 Request
RCFA1875400D Forward 4000 Lohms ± 5% 0.006 Request
RCFA1875500D Forward 5000 Lohms ± 5% 0.006 Request
RCFA1875600D Forward 6000 Lohms ± 5% 0.006 Request
RCFA1875800D Forward 8000 Lohms ± 5% 0.004 Request
RCFA1875100H Forward 10,000 Lohms ± 5% 0.004 Request
RCFA1870100D Forward 1000 Lohms ± 10% 0.008 Request
RCFA1870150D Forward 1500 Lohms ± 10% 0.008 Request
RCFA1870200D Forward 2000 Lohms ± 10% 0.008 Request
RCFA1870250D Forward 2500 Lohms ± 10% 0.008 Request
RCFA1870300D Forward 3000 Lohms ± 10% 0.008 Request
RCFA1870400D Forward 4000 Lohms ± 10% 0.006 Request
RCFA1870500D Forward 5000 Lohms ± 10% 0.006 Request
RCFA1870600D Forward 6000 Lohms ± 10% 0.006 Request
RCFA1870800D Forward 8000 Lohms ± 10% 0.004 Request
RCFA1870100H Forward 10,000 Lohms ± 10% 0.004 Request
RCRA1875100D Reverse 1000 Lohms ± 5% 0.008 Request
RCRA1875150D Reverse 1500 Lohms ± 5% 0.008 Request
RCRA1875200D Reverse 2000 Lohms ± 5% 0.008 Request
RCRA1875250D Reverse 2500 Lohms ± 5% 0.008 Request
RCRA1875300D Reverse 3000 Lohms ± 5% 0.008 Request
RCRA1875400D Reverse 4000 Lohms ± 5% 0.006 Request
RCRA1875500D Reverse 5000 Lohms ± 5% 0.006 Request
RCRA1875600D Reverse 6000 Lohms ± 5% 0.006 Request
RCRA1875800D Reverse 8000 Lohms ± 5% 0.004 Request
RCRA1875100H Reverse 10,000 Lohms ± 5% 0.004 Request
RCRA1870100D Reverse 1000 Lohms ± 10% 0.008 Request
RCRA1870150D Reverse 1500 Lohms ± 10% 0.008 Request
RCRA1870200D Reverse 2000 Lohms ± 10% 0.008 Request
RCRA1870250D Reverse 2500 Lohms ± 10% 0.008 Request
RCRA1870300D Reverse 3000 Lohms ± 10% 0.008 Request
RCRA1870400D Reverse 4000 Lohms ± 10% 0.006 Request
RCRA1870500D Reverse 5000 Lohms ± 10% 0.006 Request
RCRA1870600D Reverse 6000 Lohms ± 10% 0.006 Request
RCRA1870800D Reverse 8000 Lohms ± 10% 0.004 Request
RCRA1870100H Reverse 10,000 Lohms ± 10% 0.004 Request

Installation & Accessories

Replacement Parts & Accessories
PART NUMBER DESCRIPTION
CUTA1870104C Installation / Extraction Tool Set
JETA1870003A Replacement Pin

CAD Envelopes

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The Lee Company has developed the Lohm Laws for defining and measuring resistance to fluid flow. The Lohm is defined such that 1 Lohm will flow 100 GPM of water with a pressure drop of 25 psi at a temperature of 80°F.

Lohms for Liquids Lohms for Gases