Instrument Double Block & Bleed (DBB) ball valves

Specifications

• 1 piece or 3 piece construction
• Reduced or full bore
• Threaded * threaded, flange * threaded or flange * flange end connection
• ½” – 3”
• #150 – 2500, PN16 – PN420, API 10.000
• Materials, virtually any, CS, SS, low alloy, high alloy

Options

• Sampling
• Injection
• Locking device
• Fugitive emission tested
• Fire safe certified
• NACE

Flange by Flange

• Used in “in-line” piping applications
• Bore size from ⅜” up to 16″
• One piece and/or three piece design
• ASME B16,5, DIN and JIS flanges available

Downloads
Drawing:
instrument-dbb-flange-flange-drawing

Flange by Thread

• Used on process to instrument applications
• Bore size from ⅜” up to 1″
• One piece and/or three piece design
• ASME B16,5, DIN and JIS flanges available
• Instrument connections threaded, socket weld and butt weld available

Downloads
Drawing:
instrument-dbb-flange-thread-drawing

Thread by Thread

• Used in high pressure well head panel applications
• Bore size ⅜” up to 1″
• One piece design only
• Ball/needle ball and all ball options available

Downloads
Drawing:
instrument-dbb-thread-thread-drawing

Sampling DBB valve

A sampling valve is a valve with an integrated probe or quill.

The probe or quill is in essence a piece of pipe that is inserted into the main process pipe.

The length and diameter can be specified by the customer.

As the name already indicates this valve is used for sampling.

Injection DBB valve

An injection valve is also a valve with an integrated probe or quill just like a sampling valve.

In addition it has an integrated check valve to prevent the process medium flowing backwards to the injection medium.

The valve is typically used to injecting additives into the process medium.