903 Cast Iron Manual Bonnet
The 903 cast iron manual bonnet is an economical option for applications that do not require autoclavability. A selection of coatings makes the 903 suitable for a range of sanitary service including USDA 3A requirements. Specifications
Size Range:
½"-4" (DN15-DN100)
Max Service Pressure:
½ – 1": 200 psig (13.8 bar)
1½ – 2": 175 psig (12.1 bar)
3 – 4": 150 psig (10.3 bar)
Bonnet Material:
Cast iron with coating
Coatings available: Atmospheric white epoxy and PVDF
Handwheel Material:
Glass reinforced polyarylsulfane (PAS) coated to match bonnet ½" – 1" (DN15-DN25)
Cast iron with coating from 1½" - 4" (DN40-DN100)
Corrosion Resistance:
Resists alcohol and most semi-caustic washdowns. For specific chemical resistance, consult factory.
Literature & Maint. Manuals
Topworks Brochure
English PFTOP-06
English A4 PFTOPA4-06
Handwheel Operated Maintenance Manual for 903 PFMM-01
Product Options
Standard Features:
• Adjustable travel stop
• Protective cap
• Brass stem bushing
• Visual position indicator
• Permanent lubrication
• “O” Ring seals
• Cast iron or zinc compressor
Optional Features:
• Sealed bonnets: 903S
• Hygienic internals: ½"- 4"
• Adjustable opening stop
• Bronze compressor
• Extended handwheel
• Lockable
