1. Valve Principles
PREPARED FOR
November 20, 2018

2. Valves Multi-Turn Gate
Provide closure via the rising or lowering of a disc through the turning of a round handle
Pros
Suitable for a wide-variety of media and pressure
Cost-effective
Meets most specs
Available in a wide variety of materials and connections

3. Valves Multi-Turn Gate
Provide closure via the rising or lowering of a disc through the turning of a round handle
Cons
Does not usually provide positive shut-off
Old technology
More prone to seizing

4. Valves Multi-Turn Globe Similar to gate, used for balancing Pros
Economical alternative to “Balancing” valves
Cons
Older Technology
More prone to seizing

5. Valves
¼ Turn
Ball
A ball valve regulates control by turning a ball (usually chrome-plated or stainless steel) with a passage manufactured into it via a handle or actuation.
Pros
Simple design
Many inexpensive options
Provides positive shutoff
Cons
High price for certain applications
Steam
Fuel oil
Consulting engineers and facilities reluctant to specify for steam service

6. Valves ¼ Turn Butterfly
A disc is rotated 45-degrees within the valve body, stopping flow
Pros
Positive shutoff available
Widest variety of applications
Smaller take-out
Cons
Lead times for certain applications
Consulting engineers and facilities reluctant to specify for steam service
Pricing

7. Valves ¼ Turn Butterfly When ordering/pricing butterfly valves
Is this valve double dead-end? It should be.
What is the lead time?
Is this a “Lug” style?
Operator style: lever or gear?

8. Conclusion
PREPARED FOR
November 20, 2018