DF Series

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
Features

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

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

Materials

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

Certifications

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

Accessories:
Stem extensions with double packing
Simple stem extension
Lockable lever
Bracket for automation
Pneumatic actuator
Limit switch
Solenoid valve