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DV-4

Reliable switching valve for delayed coker services

ASME 600 – 900 Class: Reliable Switching

MOGAS’ strength is recognized in the harsh environments where reliability, durability and safety are the foundation of successful plant processes.

The DV-4 switch valve features many advantages over existing ball or plug valves on the market today. Backed by innovative R&D, world renowned after sales service and a reputation for quality, the DV-4 represents product advancements in delayed coking switching operations.

• Features & Benefits
• Application
• Downloads

6

ClosePatent-pending bonnet

• Reduces area for coke build-up
• Simplifies repair and trim replacement via true top entry design

1

ClosePatent-pending oversized outlet

• Permits higher flowrate during switching (90 to 100% compared to less than 60%)
• Minimizes backpressure and coke accumulation in heater

4

CloseOptimized purge system

• Simplifies installation using manifolds for two purge inlets and two purge outlets
  –    one packing purge
  –    three body purges
  –    two drain purges
• Increases switching reliability via body cavity flushing; evacuates body cavity media before and after switching using purge outlets
• Lowers steam consumption; appreciable steam consumption only during switching and body cavity flushing

3

CloseBelleville springs with seat rings

• Lowers steam consumption by eliminating bellow spring purge inlets
• Eliminates prone-to-fouling bellow springs

2

CloseSemi-trunnion (sleeve and seat ring supports ball)

• Maintains alignment and equalizes wiping force
• Prevents uneven seat loading and leakage
• Lowers steam consumption by sealing body cavity
• Keeps process media out of body cavity
• Reduces torque

7

ClosePatent-pending two-piece stem adaptor

• Prevents stem and actuator damage using sacrificial pins

5

CloseIntegral flange connections

• Prevents lock-up of the valve due to pipe loads (especially at warm up) because the seats are not coupled to the end flanges

8

CloseDual stem guides

• Prevents misalignment and packing leaks due to side loads

9

CloseExtended mounting bracket

• Allows room for ease of packing maintenance 
• Prevents electric motor and gear from high temperature exposure

10

CloseExternal stem extension rod

• Indicates true flow and ball bore position
• Verifies flow direction with actuator removed 

8

CloseDual stem guidesPrevents misalignment and packing leaks due to side loads

4

CloseOptimized purge system

• Simplifies installation using manifolds for two purge inlets and two purge outlets
  –    one packing purge
  –    three body purges
  –    two drain purges
• Increases switching reliability via body cavity flushing; evacuates body cavity media before and after switching using purge outlets
• Lowers steam consumption; appreciable steam consumption only during switching and body cavity flushing

Refining

• Delayed Coking

• Brochure - Valves for Delayed Coking (EN)
• Data Sheet - DV-4 Switch Valve Features and Benefits (EN)
• Data Sheet - DV-4 Features and Benefits (ES)
• Data Sheet - DV-4 Features and Benefits (CN)
• Data Sheet - DV-4 Features and Benefits (RU)