- FULL REGULATORY COMPLIANCE WITH 46 CFR PART 39 PARAGRAPH 39-20-3(a)
The ERL Model SGMRD-4, 4” round marine sight glass complies with U.S. Coast Guard regulations and is suitable for use on all liquid cargo vessels. - ROUND 13 SQUARE INCH VIEWING AREA
Mounted directly on top the vapor header, the ERL Model SGMRD-4 gives the tankerman a 13 square inch round viewing port into the compartment without exposure to potentially hazardous vapors.
- 1/2 INCH THICK GROUND AND POLISHED BOROFLOAT™ GLASS
Each 4.5” diameter BOROFLOAT™ glass is fully stress relieved with ground edges. The top face of the glass is above the stainless steel frame to prevent water pooling when used during rain. - SOLID CONSTRUCTION AND EASY MOUNTING
The ERL Model SGMRD-4 is constructed from 300 series stainless steel and mounts to any standard 4” 150 lb. class mounting flange, having (8) 0.750” diameter holes on a 7.50” diameter bolt circle.
