TVI Custom Valves
Custom Valve Solutions

Universal Butterfly


TVI Valves
(2" - 8")
  • Easier installation due to narrow face to face affords lowest installed cost compared to other valve types
  • 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 degree 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 effectively 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" - 8" valves have spring loaded latch lever for positive disc positioning and shut-off.
  • 2" - 8" 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
2 Disc 1 PVC,PP
3 Seat 1 EPDM, VITON®, BUNA N
4 Stem 1 SUS 410, SUS 316
5 Stem O'ring 1 EPDM, VITON®, BUNA N
6 Washer 1 SUS 304
7 Positioner 1 SUS 304
8 Screw 3 SUS 304
9 Indicator 1 SUS 304
10 Handle 1 ABS
11 Lever 1 ABS
12 Lever 1 SUS 410
13 Spring 1 SUS 410
14 Setpin (Long) 1 SUS 410
15 Setpin (Short) 1 SUS 410
16 Handle Cap 1 ABS
17 Stem Bolt 1 PVC, PP
18 Cap 1 PVC Coated Brass
19 Handle Insert 1 Casting Parts
20 Bolt 1 Brass, SUS 304
21 Bolt 1 SUS 304

Viton® and Teflon® are registered trademarks of DuPont Performance Elastomers.

Design Specifications


Wafer Style Universal Butterfly Valve For ANSI Flanges

Design Specifications- Thermoplastic Butterfly Valves 2"-8" are wafer style to fit between ANSI B16.5 Class 150 flanges. Disc is 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. 2" - 6" valves shall be complete with a spring loaded 6 position latch lever. 8" valves shall be either spring lever or gear actuated as required or specified. 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)

Note: The universal style 2-4" butterfly valve fits between ANSI B16.5, DIN, and JIS class 150 flanges, the 6" between ANSI and JIS flanges and the 8" between ANSI flanges.

Body - PVC,ASTM D-1784 (Standard) PP and PVDF available, PP, ASTM D-4104 PVDF available, PVDF, ASTM D-3222

Disc - PP, ASTM D-4101 (Standard) PVDF available, PVDF, ASTM D-3222

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

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

Hardware - 2" - 8" 304 S.S.

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