Keystone Butterfly Valve, Ball Valve, Wafer Check Valve, Keystone Valve Company

What is Keystone Valve Company?

Keystone is a recognized world leader in butterfly valves.

Since its introduction and original patent of the butterfly valve, Keystone has held onto and developed a great reputation for quality and reliability and extended its product range to include high-performance butterfly valves, check valves, actuators, and more!

Keystone Ball Valves

A comprehensive range of ball valves to suit a wide variety of industrial and process applications.

Specifications of Keystone Ball Valve

Certification
- PED, Fire Safe, CUTR, CE
End Connection
- Threaded, Socket Weld, Butt Weld
Application
- Dryers & Evaporators, Evaporators & Dryers, Evaporators & Recovery Boiler, Enhanced Oil Recovery, Distillation, Dairy, Cooling Water , Combustion, Cogeneration, Clean Steam, Facilities & Process Utilities, Desalination, Filling, Fuel Gas
Body Design
- Side Entry
Material
- 316 Stainless Steel, Carbon Steel
Operating Temperature
- up to 500°F
Pressure Class
- Class 150-300
Seat/Seal Type
- Soft Seal, Ball
Shutoff Class
- API 598, Zero Leakage
Standards
- API 608
Valve Size
- NPS 1 / DN 25, NPS 1/2 / DN 15, NPS 1/4 / DN 8, NPS 1-1/2 / DN 40, NPS 1-1/4 / DN 32, NPS 2-1/2 / DN 65, NPS 3 / DN 80, NPS 3/4 / DN 20, NPS 2 / DN 50, NPS 4 / DN 100, NPS 3/8 / DN 10
Valve Size Standard
- NPS, DN
Valve Type
- Floating Ball Valve, Ball Valve
Media
- Aggressive Liquids/Gases, Air, Air, Inert Gas, Ammonia, CNG, Fuel Oil, Hot Water, Light Oil, Liquid Propane Gas, Natural Gas, Mineral Oil, LPG, Liquids, NH3, Water, Vacuum, Steam, Specialty Gases, Oxygen, NH3 (Anhydrous Ammonia), Liquid Propane, Liquid
Stem
- Live loaded, Adjustable packing

Features of Keystone Ball Valves

Ball valve designs with screwed or weld end connections.
ISO 5211 top mounting plate for easy actuation.
Investment cast body construction.
Carbon steel or stainless steel body materials.
A wide range of pressure ratings is available.
Reduced and full bore models.
Locking device on all models.
Seat material options are available.
Fire-tested valves are available as F180F and R180F.

Keystone Butterfly Valve

The Figure 990 butterfly valve has a split, wafer-type body and features a one-piece disc stem and field-replaceable seat. The range of available materials makes these valves suitable for a wide variety of applications.

Features of Keystone Butterfly Valve

Factory testing of every valve at full rating ensures 100% bubble-tight shut-off.
Standardized actuator flange for easy operator interchangeability and mount direct to Keystone Range of actuators.
One-piece wafer-thin disc-stem provides high strength and absolutely positive disc control and gives the very minimum obstruction to flow. Its crevice-free surface makes it ideal for hygienic duty.
The primary seal formed by the seat/shaft/hub contact exceeds the pressure rating of the valve. The body is totally isolated from the flowing medium.
The secondary shaft seal is suitable for pressure and the vacuum is self-adjusting.
A patented dove-tail seat requires no bonding. Makes seat replacement simple and fast. Extra heavy edge section resists tearing.
Hub seal is provided by preloaded contact between flatted seat surface and rounded polished disc-hub area for positive sealing at all disc positions.
Molded-in O-ring provides positive flange sealing and eliminates the need for gaskets.
Heavy duty top bushing absorbs side thrust loads. Self-adjusting sealing for both directions is also suitable for vacuum.

Keystone Wafer Check Valve

The Keystone Figure 86 is a high capacity, spring-loaded wafer style swing check valve designed to prevent backflow in a variety of applications including pump and multi-pump systems.

Features of Keystone Wafer Check Valve

Lightweight, wafer-type check valve with face-to-face dimensions according to ISO 5752, table 5 long
High flow capacity featuring a specially shaped disc with a large opening angle resulting in high Kv values
Spring loaded disc for positive shut-off
Choice of cast iron or stainless steel body types
Field replaceable O-ring seat
Internal travel stop prevents the disc from slamming against the pipe
Excellent low-pressure shut-off
The standard low-pressure shut-off is less than 0.1 bar (10 kPa)
Slam free operation
Optional heavy spring for slam-free operation in systems with high decelerations
Optional light spring for systems with low line velocities
Optional adjustable travel stop for a system with reduced inner diameter pipe

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