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The Ghibson N501S Manually Operated Lug Butterfly Valve NSF/ANSI 61/372 Certified for drinking water with EPDM seats, valve body is Epoxy Coated, cast Iron body (CI A126). Stainless steel disc CF8M, the series offer a dual stem design and ISO 5211/DIN 3337 direct mounting for high cycle automation capabilities. The N500S series features a phenolic-backed cartridge seat design which offers a 250 CWP maximum pressure rating, dead-end service to 100 PSI, and conforms to ANSI B16.1 and ANSI B16.5
Available in sizes from 1 1/2" to 24.

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The Ghibson series N501S Lug ANSI 150 Flanged Butterfly valve, ACF8M SS disc, NSF Certified for EPDM seats, features:
- Epoxy coated ductile iron (EN-GJS 400-15) Lug body
- ISO 5211 Direct Mounting pad/square stem
- Food grade EPDM resilient seat -30°F to +266°F.
- Pressure rating: 250 psi: 1 1/2”-20” and 150 psi: 24”
- API609 face to face flange
- Floating dual shaft disc design
- MSS SP 67 Compliant
- No pins in disc prevent potential leak points
- NSF certified for drinking water service (EPDM seats only)
Models
- N501S EPDM seats Sizes 1 1/2" to 24"
- 531S FKM seats Sizes 2" to 20"
- 541S NBR seats Sizes 2" to 20"
Summary Specifications for Bonomi series N500S (Please see attachment for full specs.)
Size 1 1/2" 2" 2 1/2" 3" 4" 5" 6" 8" 10" * 12" * 14" * 16" * 18" * 20" * 24" * ISO 5211 F07 F07 F07 F07 F07 F07 F07 F10 F10 F10 F12 F12 F14 F14/F16 F16 Seat Torque (100psi) 97 106 142 266 381 460 531 947 1549 2390 3983 4248 4602 5310 17347 Weight (in lbs.) 10.58 12.13 15.65 17.42 21.83 25.90 29.87 59.52 74.96 108.03 136.69 198.42 374.79 396.83 639.34 * Available only with bare stem
Detailed Valve Specifications
Please refer to the image below for specification. Click on the image to expand
Ghibson N501S 531S 541S Spec Sheet Ghibson N501S 531S 541S- N501S
Data sheet
- Valve Type
- Butterfly Valve
- Valve Size
- 1.5 (1 1/2") 2" 2.5 (2 1/2") 3" 4" 5" 6" 8" 10" 12" 14" 16" 18" 20"
- Valve Temperature Range
- -30° to 250 (°C -34 to 121)
- Valve Body Material
- Ductile Iron
- Valve Disc Material
- CF8M Stainless Steel
- Valve Connection
- ANSI 150 Lug
- Valve PSI
- 250
- Valve Configuration
- 2-Way
- Valve Operation
- Manual
- Valve Certification
- NSF/ANSI 61 NSF/ANSI 372
- Valve Seat
- EPDM
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