Name: Keystone Figure 310/312 High Performance Butterfly Valve
Brand: Keystone

High performance applications such as steam, chill water, water, utility lines, gasoline, natural gas, air, oil, jet fuels and process lines.

Keystone Figure 310/312 High Performance Butterfly Valve

Specs

Certifications

ABS, CRN

End Connection

Wafer, Lugged

Application

Air Circulation, Air Cooled Heat Exchangers, Facilities & Process Utilities, Plant Air, Balance of Plant

Material

316 Stainless Steel, Carbon Steel

Operating Temperature

Less Than 400 F (204 C)

Pressure Class

ASME

Process Connection Type

CL150RF

Seat/Seal Type

High performance

Shutoff Class

Zero Leakage

Standards

ASME B16.34, API 609

Valve Size

NPS 4 / DN 100, NPS 6 / DN 150, NPS 8 / DN 200, NPS 3 / DN 80, NPS 2-1/2 / DN 65, NPS 12 / DN 300, NPS 2 / DN 50, NPS 10 / DN 250

Valve Size Standard

NPS

Valve Type

Butterfly

Media

Water, Vacuum, Liquids, Air

Stem

Adjustable packing

Features

Uninterrupted gasket surfaces help eliminate problems associated with seat retaining screws in the gasket surface and allows use of standard spiral wound gaskets.
Unique interference seat design with energized elastomer O-ring allows bi-directional ANSI Class VI shut-off at lower pressures. The seat is further energized by line pressure, providing the same tight bi-directional shut-off at full-rated pressure.
Heavy duty circular key holds the seat and retaining ring in place, providing bi-directional, dead-end service at full-rated pressure. This helps eliminate the need for easily corroded and hard-to-remove retention screws.
Valve stem designed to API 609 standards is blow-out resistant.
Seat retaining ring is housed within the flange gasket ID to eliminate potential emission path.
Face-to-face conforms to MSS SP-68 and can be configured to ISO 5752 short.
Adjustable packing utilizes unique rocker-shaped gland bridge that compensates for uneven adjustment of gland nuts.
Extended neck allows for two inches of clearance for insulation.