What is awwa C500?

What is awwa C500?

Back to AWWA C500-09 Metal-Seated Gate Valves for Water Supply Service. This standard describes iron-body, brass-mounted, nonrising-stem (NRS) gate valves, including tapping gate valves, 3-in. (75-mm) NPS through 48-in.

What are different types of gate valves?

Introduction to Gate Valves and Gate Valve Types

• 1: Full-Port Gate Valve.
• 2: Parallel Disk Gate Valve.
• 3: Solid Wedge Gate Valve.
• 4: Flexible Wedge Gate Valve.
• 5: Split Wedge Gate Valve.
• 6: Rising Stem gate valve.
• 7: Non-Rising Stem gate valve.
• 8: Gate valve materials.

What is wedge in gate valve?

The purpose of the wedge shape is to introduce a high supplementary seating load that enables metal-sealed wedge gate valves to seal against not only high but also low fluid pressure. The wedge shape also results in a seal on both sides of the gate.

What are the 2 types of gate valves?

Gate valves can be divided into two main types: Parallel and wedge-shaped. The parallel gate valves use a flat gate between two parallel seats, and a popular type is the knife gate valve designed with a sharp edge on the bottom of the gate.

How do you identify a gate valve?

The gate can be shaped like a wedge, knife, or parallel. Physically, gate valves are higher than globe valves when fully opened, but have a smaller face to face length. The gate being moved up or down is easy to visually acknowledge as the valves operate with either a rising stem or a non-rising stem.

What is yoke in gate valve?

Yoke. A Yoke connects the valve body or bonnet with the actuating mechanism. The top of the Yoke holding a Yoke nut, stem nut, or Yoke bushing and the valve stem passes through it. A Yoke usually has openings to allow access to the stuffing box, actuator links, etc..

What is the seat of a gate valve?

Seats of a Gate valve Seats for Gate valves are either provided integral with the valve body or in a seat ring type of construction. Seat ring construction provides seats which are either threaded into position or are pressed into position and seal welded to the valve body.

What is a full-port gate valve?

A full-port valve specification refers to the bore of the valve having no restriction in the piping. Well, a standard (reduced) port valve can cause a restriction of flow, which can cause cavitation, and loss of pressure. Another reason for full-bore valves is for cleaning.

How do I know what type of valve I have?

The tag itself should identify the valve, usually by showing the valve number. The type of valve and the system the valve is part of typically are identified. For example, the valve tag might read “200# Main Steam Shut Off.” This identifies the valve as the shutoff valve in the 200-pound main steam line.

How do I know if I have a globe and gate valve?