The DF Series is a process double block & bleed (DBB) floating ball valve with a modular construction. It features double positive isolation with minimal external potential leakage points. This valve is suitable for flow measurement, sampling, chemical injection, and process isolation. Designed according to the ASME B16.34 standard, it is durable and reliable.
| Pressure ratings |
CL150, CL300, CL600, CL1500, CL2500 |
|---|---|
| Temperature range |
-50ºC to 240ºC (-58°F to 464°F) |
| Size range |
½″ – 4″ |
| Body style |
Double block and bleed | Twin Ball | Full/Reduced Bore |
| End connections |
Flanged | Welded | Threaded |
| Body materials |
A350 LF2 cl.1 | A479 316/L |
| Seat materials |
C-RPTFE, DEVLON |
Standard Features:
Floating ball | Double block and bleed | Twin ball | Soft seated | Full/Reduced bore | Bidirectional
Antistatic design
Low emission packing | Live loaded stem packing
NACE MR0175 / ISO 15156 compliance
Double encapsulated body sealing
ISO 5211 top works for automation
Anti blowout stem
Self relieving seats | Pressure equalizing hole
Optional Features:
Food grade compatible version (CE1935/2004 version)
Fire safe design
Construction standards:
ASME B16.34 | ISO 17292
ISO 5211
End connection standards:
RF Flange – ASME B16.5 Raised Face
RTJ Flange – ASME B16.5 Ring Type Joint
SW – ASME B16.11 Socket Weld
BW – ASME B16.25 and B36.10M Butt Weld
BW Nipple – ASME B16.25 and B36.10M Long Butt Weld
NPT – ASME B1.20.1 Threaded
BW – ISO 1127 or ISO 4200 Butt Weld
BW Nipple – ISO 1127 or ISO 4200 Long Butt Weld
BSPT – ISO 7-1 Threaded
BSPP – ISO 228-1 Threaded
Face to face standards:
Manufacturer standard
Pressure testing standards:
EN 12266-1 | ISO 5208 | API 598 Rate A
Body materials:
Standard: A350 LF2 cl.1; A479 316/L | Optional: A479 S31803 (Duplex F51); A479 S32760 (Super Duplex F55); Alloy 22; Alloy 625; others
Trim materials:
Ball – Standard: A351 CF8M | Optional: A479 316/L; others
Stem – Standard: A479 316/L; A564 S17400 | Optional: Alloy 718; others
Seat materials:
Standard: C-RPTFE; DEVLON | Optional: TFM 1600; PEEK
Bolting materials:
Standard: A320 Gr. L7M; A193 Gr. B8M cl.2
Product certification:
Fire tested acc. to API 607 and ISO 10497
Fugitive emissions tested acc. to ISO 15848
Fugitive emissions tested acc. to TA-Luft VDI 2440
ATEX 2014/34/EU
PED 2014/68/EU
Accessories:
Stem extensions with double packing
Simple stem extension
Lockable lever
Bracket for automation
Pneumatic actuator
Limit switch
Solenoid valve