TVI Custom Valves
Custom Valve Solutions

Butterfly 2-24


TVI Valves

Butterfly Valve

Gear Type (2" - 24")

 

  • Lower initial cost compared to other valve types.
  • Easier installation due to narrow face to face affords lowest installed cost.
  • Designed to fit between ANSI D-16.5 Class 150 flat faced flanges.
  • Strong, one piece molded body design.
  • One piece standard S.S. through shaft for positive disc rotation and support.
  • Standard polypropylene (PP) disc for higher (180°F) temperature service.
  • Full body liner seat with integral flanges (eliminates the need for flange gaskets) ribbed for positive flange seating with minimum required torque.
  • Standard PVC body and S.S. shaft are isolated from the flow media by the full liner seat.
  • Standard S.S., carbon steel plated, or epoxy coated external hardware for added corrosion resistance.
  • 2" - 24" valves have epoxy coated self-locking worm gear actuators for ease of operation and accurate flow control.
  • Electric and pneumatic actuation packages available.
  • Locking handles available.
  • Stem extensions, universal joints, floor stands available in a variety of materials.

Schematics


ITEM PARTS PCS MATERIALS
1 Body 1 PVC,CPVC,PP,PVDF
2 Seat 1 EPDM,VITON® BUNA N
3 Disc 1 PVC,CPVC,PP,PVDF
4 Disc O-Ring (A) 2 EPDM,VITON® BUNA N
5 Disc O-Ring (B) 2 EPDM,VITON® BUNA N
6 Stem 1 SUS410, SUS304, SUS316
7 Stem O-Ring 2 EPDM,VITON® BUNA N
8 Gear Box 1 C.I.
9 Gear Box Cap 1 C.I.
10 Side Cap 1 C.I.
11 Indicator Plate 1 PVC
12 Gear 1 FORGED STEEL
13 Oil Seal 1 EPDM
14 Bearing 1 HEAT TREATED STEEL
15 Adjustable Bolt 2 SS41
16 Gearing 1 SS41
17 Set Pin 1 STEEL
18 Hand Wheel 1 C.I.
19 Tightening Bolt 4 SUS304

VITON® is a trademark of DuPont Performance Elastomers

Design Specifications


Thermoplastic Butterfly Valves 2"-24" are wafer style to fit between ANSI B16.5 Class 150 flanges. Disc is smooth and contoured for lowest possible pressure drop ( highest Cv). Shaft is 410 S.S. and of one piece, through shaft design, with square drive through entire length of blade. 24" valves shall have epoxy coated gear actuators with handwheel. Seat liners shall be full faced with integral, ribbed flanges. No auxiliary gaskets shall be required for installation. Seat liners shall effectively isolate the body and shaft from the flow media. Seat liners shall also thermally insulate the body from the internal operating temperature. Valve liner and seals are replaceable. Materials of construction shall be: (select as required for service)

Body - PVC,CPVC available to 12", ASTM D-1784
PP, ASTM D-4101
PVDF, ASTM D-3222

Disc - PP, ASTM D-4101 (Standard 2"-24" in PVC and PP valves)
PVC, CPVC, ASTM D-1784 (CPVC disc standard in CPVC valves)
PVDF, ASTM D-3222

Shaft - ASTM A-240, TYPE 410 S.S. (Standard) 304 S.S., 316 S.S. and Titanium available

Seat/Seals - EPDM, Ethylene Propylene Diene Monomer
Fluorocarbon, Viton® (DuPont Dow Elastomers)
Nitrile(Butadiene) Rubber (BUNA-N)

Hardware - 2" THRU 24" 304 S.S. 8" size positioner plate 410 S.S. Chrome Plated

Lever - ABS, ASTM D-1788

Gear Box - Cast iron housing ASTM A -53, Epoxy coated

Other Materials Available Upon Request.

Not recommended for compressed air or gas service