posi-flate butterfly valves
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Series
485
Single piece housing with disc and shaft. Sizes 5” (125 mm) to 30” (800 mm).

Series
486
Split housing with integral stainless steel disc and shaft or integral molded nylon disc and stainless steel shaft. Sizes 2” (50 mm) to 30” (800 mm).

Series
487
Split housing with disc and shaft. Size 4” (100 mm).

Series
488

Split housing with integral cast iron disc and shaft. Sizes 2” (50 mm) and 3” (80 mm).

Series 485 Cutaway 

 

Design features for reliable performance

A. ACTUATOR MOUNTING FLANGE: Flange is designed for direct actuator mounting.

B. RETAINING RING: Retaining ring simplifies bearing and seal removal and ensures positive bearing retention.

C. BEARINGS: Multiple bearings substantially reduce operating friction and torque requirements eliminating any metal-to-metal contact, thus preventing shaft galling and freezing.

D. SHAFT SEALS: O-ring shaft seals insure positive sealing under the most adverse conditions.

E. SHAFT: Corrosion resistant, high strength steel shaft is easily replaceable.

F. SEAT O-RING SEAL: O-ring provides long lasting positive seal of seat inflation pressure.

G. MATERIAL SEAL: Land seal prevents material contamination of seat o-ring seal.

H. DISC/SHAFT: Integral disc and shaft with smooth, contoured surface provides minimum resistance to flow and reduces material buildup.

I. AIR INLET PORT: Oversized inlet port allows quick valve pressurization/
depressurization.

J. DISC: Smooth contoured surface assures extended seat life and disc is easily replaceable.

K. DISC SCREWS: Self-locking screws of high tensile steel provide strong link between disc and shaft, yet allow easy disassembly.

 

Series 486 Cutaway 

L. HOUSING: Rugged one-piece body fits standard 125/150 class ANSI flat-faced flanges and PN 10 metric flanges.

M. HOUSING GASKET: Die cut elastomeric gasket assures leakproof housing.

N. HOUSING BOLTS: High strength steel bolts maintain structural integrity of housing under the most adverse conditions.

O. SPLIT HOUSING: Rugged two-piece body fits standard 125/150 class ANSI flat-faced flanges and PN 10 metric flanges. Minimizes assembly time and allows for integral shaft and disc.

P. RESILIENT SEAT: Easily replaceable, the inflatable molded seat has a smooth contour locking design to minimize stress and hold the seat in place, eliminating any need for flange gaskets. 

  

 
Inflatable Seated Butterfly Valves
Series 485, 486, 487, 488
Bulletin - English
 

 

Series 485, 486, 487, 488
Bulletin - Chinese

 


Vannes Papillon à Siège Gonflable
Séries 485, 486, 487, 488
Bulletin - French

 
Drehklappen mit
Blähmanschette
Serie 485, 486, 487, 488
Bulletin - German
 

Valvole a farfalla con guarnizione gonfiabile
Serie 485, 486, 487, 488
Bulletin - Italian
  

Series 485, 486, 487, 488
Bulletin - Japanese

Zawory Motylkowe Uszczelniane Pneumatycznie
Seria 485, 486, 487, 488
Bulletin - Polish

Vávula Borboleta com Sede Inflável
Séries 485, 486, 487, 488
Bulletin - Portuguese
 
Válvulas de Mariposa con Asiento Inflable
Series 485, 486, 487, 488
Bulletin - Spanish

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