G4B Marathon ValveViton O-Rings and welded metal diaphragm stem sealsSleeve and diaphragm cut in four places
Conventional Plug Valve > 2000 PPM G4EB Valve
0
10
20
10 20Cycles (x 1000)
PPM
140 160
100
90
80
70
60
50
40
30
20
10
00 10 20 30 40 50
% of Valve Opening
% o
f Max
imum
CV
60 70 80 90 100
FLOWSERVE offers Automax, Norbro and Worcester Actuators and Instrumentation allowing us to supply complete automated on-off or modulating packages to meet exacting technical requirements.Durco Sleeveline valves are readily adaptable for automatic operation because the torque is relatively constant and lubrication is not required.Flowserve, a specialist in complete automation systems, produces a broad line of rack and pinion, heavy duty, electric and linear actuators. In addition, a comprehensive line of engineered special control circuits, solenoid valves, limit switches positioners and actuator mounting kits is offered.
Our wide range of electrical and pneumatic instrumentation incorporates: • Digital network communication • Superior diagnostics • Intelligent valve controllers • Comprehensive user-friendly software
• On-line accessible automated drawing system • Control sizing software • Actuator sizing software
•
For complete tables of torque and Cv (Kv) values, please refer to the Instrument Engineers Handbook for Durco Quarter-Turn Control Valves
DDDoisFFaaaca
Oin
½ ⅝ ⅜ ⅝ ⅝ ¼ ½ ½ ⅞ 3/16 7/16 9/16¾ ⅝ ¾ ¾ ¼ ⅝ ¾ 3/16 7/16 ⅝
⅝ ⅛ ¾ ½ ½ ¼ ⅞ 23/32 7/16 11 /16½ ⅝ ⅞ ⅞ ½ ½ ½ ⅛ 5/32 9/16 13/16
¾ ¾ ¾ ½ ½ ¾ ⅝ ⅞½ ¾ ½ ⅞ ⅞ ½ ½ ½ 11/16
¾ ⅞ ⅝ ⅛ ½ ¼ ¾ ⅛¾ ½ ⅞ ⅞ 2⅓2 15/16 ¼¾ ½ ⅞ ⅞ 15/16 ¼⅞ ½ ⅞ ⅝ ½ ⅞ ½ 7/16⅞ ¾ ½ ½ ½ ⅛ ⅝
¼ ⅛ ¼ ½ 3/16 ⅞¼ ¾ ¾ ½ ¼
⅛ ¾ ¼ ¼ ⅜ ⅛⅛ ¼ ⅜ ½ ½ ½ 7/16 ¼¼ ¾ ⅜ ¾ 9/16 ⅜
½ ⅜ 17/32 7/16 23/32 25/32 25/32 ½ ¾¾ 11 /16 17/32 7/16 23/32 25/32 25/32
25/32 2⅓2 ⅞ 13/16 13/16 ¾ ¼½ ⅞ 25/32 2⅓2 15/16 ½ ½ ½
⅝ 1 /16 ⅞ 5/16 5/16 ½ ½½ ⅛ 1/16 ⅞ 3/16 ½
1/16 ⅞ 3/16 ½ ½ 3/16 11 /16 27/64 9/8 ⅓2 ⅓2 ¾ 3/16 11 /16 27/64 9/16 ⅜ ½ ½ 13/16 ¾ ½½ ⅞ 27/64 5/16 ⅜ ½ ½ 13/16 ¾ ½⅝ ⅜ ⅛ ⅛ 5/16¾ 23/32 5/16 5/16 5/16
⅞ 1 /16 1 /16 5/16¼ 11 /16 9/16 9/16 5/16½ 3⅓2 ⅛ ⅛ ⅛ 1/16 5/16
3⅓2 ⅛ ⅛ ⅛ 1 /16 5/16
½ ¼ ½ ⅝ ⅞ 3/16 ¾ ⅞ 7/16 9/16 ⅜ 25/32¾ ⅝ ¾ 3/16 7/16 ⅝ 11 /16 25/32
½ ¼ ⅞ 23/32 ½ ¾ 7/16 11 /16 13/16½ ½ ½ ⅛ 5/32 ⅛ ⅜ 9/16 13/16 ⅞ ½
½ ½ ¾ ½ ¾ ⅝ ⅞ ⅝ 5/16½ ½ ¼ ⅛ 9/16 ¾ ⅛ ½
2⅓2 ¾ 15/16 ¼ 3/16 ⅜½ ⅞ ½ ½ ½ 7/16 ½½ ½ ½ ⅛ ⅝ ⅝
½ ¼ ¼ 3/16 ⅞ ¾
½ ⅝ ⅜ ⅝ ⅝ ¼ ½ ½ ⅞ 1⅓2 7/16 9/16 ⅜ 17/32 7/16¾ ⅝ ¾ ¾ ¼ ⅝ ⅞ ¾ 1⅓2 7/16 ⅝ 11 /16 17/32 7/16
⅝ ⅛ ¾ ½ ½ ¼ ⅞ 15/16 7/16 11 /16 25/32 2⅓2½ ⅝ ⅞ ⅞ ½ ½ ½ ⅛ ¼ 9/16 13/16 ⅞ 25/32 2⅓2
¾ ¾ ¾ ½ ½ ⅝ ⅝ ⅞ ⅝ 11 /16 ⅞¾ ⅞ ⅝ ⅛ ½ ¼ 3⅓2 ¾ ⅛ 11 /16 ⅞¾ ½ ⅞ ⅞ 27/32 15/16 ¼ 3/16 11 /16 27/64⅞ ½ ⅞ ⅝ ½ ⅞ ½ 11 /16 7/16 ½ ⅞ 27/64/8 ¾ ½ ½ ½ /32 ⅛ ⅝ ⅝
½ ⅝ ½ ¾ ⅞¾ ⅝ ½ ⅞
11 /16 11 /16 13/32 9/16 ½ ¾ 13/16 27/32½ ¾ 13/32 5/16 9/16 ⅛ ⅜ 13/16 27/32
13/16 ½ 13/32 5/16 9/16 ½ ¾ 13/16 27/32 ⅞ 11 /16 ½ 9/16 ⅛ 9/16 13/16 ⅜
⅜ 9/16 7/16 ½ ¾ 13/16 7/16 ⅜ ½ ½ ½ ½ ⅝ ⅜ 23/32 ¼ ¼ 15/16 5/16
½ 15/16½ 9/16 ¾
¾ 15/16¼ ¼¼ ¾
¼½ ¾
3/
¾ ¾ ¾ ⅝ ½ 23/32 ¾½ ½ ¾ ½ ⅞ ⅞ ½ ¼ ½ 5/32
¾ ⅞ ⅝ ⅞ ½ ¼ ¾ ½¾ ½ ⅞ ⅞ ¾ ¼ ⅞ ½ ⅞ ⅝ ½ ½ ½ 2⅓2 3/16 ⅞ ¾ ½ ⅝ ½ 7/16
9/16 ⅞ ⅝ 25/32 2⅓2 ⅞ 13/16 5/16 ¾½ ⅝ ⅛ 25/32 2⅓2 5/16 ½ ⅜ ¾
11/16 ⅛ 1 /16 ⅞ 5/16 ⅜ ⅞ ¼ 3/16 1 /16 ⅞ 3/16 ½ ¾
15/16 7/16 ½ 11 /16 27/64 9/16 ⅓2 ¼ 1 /16 ⅝ ⅝ ⅞ 27/64 9/16 ½ ¼
1/16
¼ ½ 3/16 ¾ 7/16 25/32 9/16 ¾ ⅜ ½ 3/16 ¾ 7/16 25/32 9/16 ½½ ½ 3/16 11 /16 7/16 25/32 9/16 ½¾ ½ 3/16 ¾ 7/16 25/32 9/16 ¼
⅝ 23/32 ⅜ 2⅓2 13/16 15/16 ½½ ½ 5/32 ⅞ 2⅓2 ½ 9/16 ½
¾ ⅜ ⅞ 5/16 ⅛ ½
¼ ½ 3/16 1⅓2 25/32 9/16 ⅜ ½ 3/16 1⅓2 25/32 9/16 ¾½ ½ 3/16 1⅓2 25/32 9/16 ¾¾ ½ 3/16 1⅓2 25/32 9/16 ½
⅝ 23/32 19/32 13/16 15/16½ ½ 5/32 ⅞ ½ 9/16 ¼
¾ 7/32 5/16 ⅛ ¾
¼
¼ ¾
½
¼ ¾
¼ ½ 3/1 1⅓2 25/32 9/16⅜ ½ 3/16 1⅓2 25/32 9/16½ ½ 3/16 1⅓2 25/32 ⅜ 9/16¾ ½ 3/16 1⅓2 25/32 ½ 9/16 ¾
⅝ 23/32 19/32 13/16 ½ 15/16½ ½ 5/32 ⅞ ½ ½ 9/16 ¼
¾ 7/32 5/16 ⅝ ⅛ ¾¼
¼ ¾
½
½ ½ ½ 3/16 7/32 25/32¾ ½ ½ 3/16 7/3 25/32
½ ½ 23/32 19/32 13/16½ ½ ½ 5/32 ⅞ ½
½ ½ ¾ 7/32 5/1 29/32 ½
2⅓2 11 /16 9/32 23/32 ⅞
7/16 3/16
¼
½
23/32 ½¼ 2⅓2 ½½ 2⅓2 ½
¼½ 5/16
5/16½
¼ /8 9/16 ⅛ 13/16½ ¾ ⅜ 9/16 ⅛ 13/16
1 /16 ⅜ 9/16 ⅛ 13/165/16 1 /16 9/16 ⅛ ⅜ ⅜ 7/16 ⅛ 1 /16 ½⅜ 7/16 ⅛ 1/16 ½ ⅛ ⅛ 5/16 5/16 ½9/16 ½ 9/6 5/16 5/16 ½ 9/16 ½ 9/16 15/16 5/16 ½ 9/16 ½ 9/16 5/16 ½5/16 5/16 1 /16 5/16 ½ 5/16 5/16 1 /1 5/16 ½
How to Specify
