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Check Valves

187 Axial Flow Check Valve

This miniature check valve is only 0.187 inches in diameter and 0.62 inches in length. This valve features an economical ball-style design allowing free flow in one direction and preventing flow in the other direction. It is ideal for applications with flow rates up to 0.8 GPM. An integral safety screen is available for increased protection against contamination.

Key Product Facts
  • Ball-Style Check Valves
  • Diameter:0.187 inches
  • Lohm Rate:400 Lohms max
  • Operating Pressures:Up to 3000 psi
  • Leakage:1 drop / hour at 3000 psi

Product Information

General Performance
Characteristic Specification
Cracking Pressure 5 ± 3 or 1 ± 0.5 psid
Maximum Leakage in Checked Direction at 5 psid 1 Drop / Minute
Maximum Leakage in Checked Direction at 1000-3000 psid 1 Drop / Hour
Lohm Rate at 20 psid and Greater Unscreened: 400 Lohms
Screened: 460 Lohms
Nominal System Pressure Up to 3000 psi
Nominal Weight Unscreened: 1.5 grams
Screened: 2.3 grams
Available Screen Hole Size 0.008 inches Nominal
Test Fluid MIL-PRF-83282 at 85°F
Body 303 CRES QQ-S-763C
Pin 303 CRES QQ-S-763C
Spring 17-7PH CRES AMS 5678
Ball 440C CRES AMS 5630
Ball Follower 303 CRES QQ-S-763C
Spring Seat 303 CRES QQ-S-763C
Cage 303 CRES QQ-S-763C
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.
Flow Curves
Cross Section Views
Dimensional Views
Installation Hole Details

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 Cracking Pressure (psid) Lohm Rate Screen Hole Size (Inches) Flow Direction Request Information
CKFA1876005A 5 ± 3 400 Lohms Maximum - Forward Request
CKFA1871001A 1 ± 0.5 400 Lohms Maximum - Forward Request
CKRA1876005A 5 ± 3 400 Lohms Maximum - Reverse Request
CKRA1871001A 1 ± 0.5 400 Lohms Maximum - Reverse Request
CKFA1875005A 5 ± 3 460 Lohms Maximum 0.008 Forward Request
CKFA1875001A 1 ± 0.5 460 Lohms Maximum 0.008 Forward Request
CKRA1875005A 5 ± 3 460 Lohms Maximum 0.008 Reverse Request
CKRA1875001A 1 ± 0.5 460 Lohms Maximum 0.008 Reverse Request

Installation & Accessories

Replacement Parts & Accessories
CUTA1870104C Installation / Extraction Tool Set
JETA1870003A Replacement Pin
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From plugs to solenoid valves, there’s a vast array of products that The Lee Company can offer. If you’d like to discuss the best solution for your specific application or to learn more about our capabilities, use-cases, or quality standards, contact your local Lee sales engineer.