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Oct . 11, 2025 09:30 Back to list

Butterfly Valve 2.5 Inch - Food-Grade, Leak-Tight, In Stock



Field notes on a 2.5-inch butterfly valve that quietly gets the job done

If you’re speccing a mid-line isolation valve for a compact skid, you’ve probably searched for a butterfly valve 2.5 inch more times than you’d like to admit. I get it. Space is tight, maintenance windows are tighter, and procurement wants something reliable without drama.

The Long Neck Lug Type Model 30 lands in that sweet spot. Built in the development area of Huanmadian, NingJin county, Hebei, China, it pairs a large, ISO 5211-compatible top flange with practical actuation choices—lever, manual gear, electric, or pneumatic. The “long neck” clears insulation and makes actuator mounting less of a headache, which, to be honest, is half the battle on many jobs.

Butterfly Valve 2.5 Inch - Food-Grade, Leak-Tight, In Stock

Quick technical snapshot (DN65, ≈2.5")

Model / Type Long Neck Lug Type Model 30 (DN65)
Pressure rating PN16 or Class 150 (typical); shell test ≈1.5× rating; seat test ≈1.1× per API 598 / EN 12266-1
Body Ductile iron (ASTM A536), epoxy-coated
Disc 316 stainless or Ni-plated ductile iron
Seat / Liner EPDM, NBR, or FKM/Viton (potable-water and oil-service options; real-world use may vary)
Stem SS 410/420; blowout-proof design
Top flange ISO 5211 large pad; actuator-ready
End connection Lug type, bidirectional, dead-end capable (check rating)
Temperature window ≈ -10°C to +120°C with EPDM; higher with FKM
Leakage class Bubble-tight for elastomer seat (per API 598)
Service life Up to ≈100,000 cycles under clean water at PN16 (lab-tested); depends on media and actuation

Process, testing, and certifications

Materials are batch-tracked; bodies are shot-blasted, coated, then assembled with precision-machined stems and seats. Each valve is hydro-tested—shell at roughly 1.5× rating and seat at ≈1.1×—per API 598 / EN 12266-1. Top flange follows ISO 5211 for actuator interchangeability. Facilities typically operate under ISO 9001; potable-water liners can be supplied to NSF/ANSI/CAN 61 or WRAS on request. For EU shipments, ask for PED 2014/68/EU conformity. If you’re in sour service, verify NACE MR0175 compatibility of wetted metals.

Where it fits (and why it’s popular)

  • Water and wastewater skids, building services, and district energy loops.
  • Food & beverage CIP return lines; the smooth disc profile helps reduce pressure drop.
  • Compressed air and inert gas, when elastomer selection matches the media.
  • Light hydrocarbons with FKM—though I always advise a compatibility check.

Many customers say the long neck makes insulation crews happier—no carving foam around actuators. And maintenance teams like the positive lug alignment on flanged spools. For a butterfly valve 2.5 inch in a crowded rack, that little ergonomic detail matters.

Butterfly Valve 2.5 Inch - Food-Grade, Leak-Tight, In Stock

Vendor snapshot (what buyers compare)

Item Hongda Model 30 Vendor A Vendor B
Top flange ISO 5211 long-neck, large pad ISO 5211 standard ISO 5211 standard
Pressure class PN16 / Class 150 (typical) PN10–PN16 Class 125–150
Actuation options Lever, gear, electric, pneumatic Lever, gear Gear, electric
Lead time (DN65) Around 10–20 days, ex-works (varies) 2–4 weeks 3–5 weeks
Certs (typ.) ISO 9001; PED/NSF on request ISO 9001 ISO 9001; WRAS (select)

Customization and real-world feedback

Options that tend to matter: disc in 316 SS for mildly corrosive media; EPDM vs. FKM depending on temperature; dry bearing vs. PTFE-lined bushings for sticky slurries; gear operator with padlock hasp for safety. One beverage plant told me their butterfly valve 2.5 inch units cut swap-out time by about 30% thanks to the lug alignment and actuator pad—small win, big morale boost.

Mini case study

A regional HVAC contractor retrofitted DN65 risers in a hotel tower. Mixing EPDM seats with manual gears and leaving clearance for 30 mm insulation, they reported zero seat leakage on commissioning. Hydro tests at ≈24 bar shell, 17.6 bar seat (water, 20°C) passed first shot. Not flashy, just dependable.

Final note: sizing a butterfly valve 2.5 inch is about more than pipe diameter—check differential pressure, media compatibility, and actuator torque at worst-case temperature.

Authoritative references

  1. API 609: Butterfly Valves—Double-flanged, Lug- and Wafer-type.
  2. ISO 5211: Industrial valves—Part-turn actuator attachments.
  3. EN 12266-1: Industrial valves—Testing of metallic valves—Pressure tests.
  4. API 598: Valve Inspection and Testing.
  5. AWWA C504: Rubber-Seated Butterfly Valves.
  6. PED 2014/68/EU: Pressure Equipment Directive.
  7. NSF/ANSI/CAN 61: Drinking Water System Components—Health Effects.

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