Block & Bleed Valves Features

Introduction

The unique combination of double block and bleed valve systems enable a smooth transition from the process piping system to instrumentation, providing fewer potential leak points, lower installed weight, and a smaller space envelope.

Applications

Process piping isolation points

Direct mount to instruments   

Close coupling of instruments

Double block and bleed isolation

Vents and drains

Maximum working pressure up to 10000 psig (689 bar)         

Working temperature up to 1200℉ (649℃) with Graphite packing

Colour coded valve function identification

Every valve is hydraulic pressure tested in accordance with EN 12266-1 and API 598. Every set is tested with nitrogen for leak-tight performance at 6000 psig

Fire-tested design in accordance with BS 6755 part 2/API 607

Flanged connections comply with ASME B16.5 RF and RTJ

Pressure ratings in accordance with ASME B16.34

Ball Type Valve specification

Features

Maximum working pressure up to 10000 psig (689 bar)

Working temperature are as follows:

PTFE: -65℉ to 450℉ (-54℃ to 232℃ ) PEEK: -65℉ to 450℉ (-54℃ to 232℃ )

Actuate at quarter-turn

Directional stem flats show open or closed position

Bottom-loaded stem prevents stem blowout and enhances system safety

High-strength stem bearing provides smooth actuation and eliminates galling between valve stem and body

It may be required to adjust the packing during the service life of the valve

Hikelok ball valves are designed to be operated in a fully open  or fully closed position

Needle Type Valve specification

 Features

 Maximum working pressure up to 10000 psig (689 bar)

Working temperature:

PTFE packing: -65℉ to 450℉ (-54℃ to 232℃ ) Graphite packing: -65℉ to 1200℉ (-54℃ to 649℃ )

Two-stem design: thread hardened upper stem and smooth surface

hardened lower stem

Upper stem thread lubricant is isolated from system fluid

The nonrotating lower stem, linearly instead of helical movement, avoids galling damage to the seat and tip, as well as reduces the total friction area between the packing and the lower stem

Stem back seating seals in fully open position

Panel mounting is available as an option

Double lock-pins enable steady and durable fastening of the handle

Handle of different colors are available for option

OS&Y Needle Type Valve specification 

Features

The unique combination of do

Maximum working pressure is 10’000psig (689 bar)

Working temperature are as follows:

PTFE: -65℉ to 450℉ (-54℃ to 232℃ )

Graphite: -65℉ to 1200℉ (-54℃ to 649℃ )

Two-stem design: thread hardened upper stem and smooth surface hardened lower stem

Upper stem thread lubricant is isolated from system fluid

The nonrotating lower stem, linearly instead of helical movement, avoids galling damage to the seat and tip, as well as reduces the total friction area between the packing and the lower stem

Bolted bonnet enhance strength and reliability

Back seat design provides secondary stem sealing and prevents stem blowout

Adjustable gland flange allows easy access to the packing gland and packing adjustment for an effective stem seal

Investment case yoke is formed by precision casting which enhances strength and perfect stem alignment

Two handle pins make the handle fixed firmly and lastingly

Set S crew

Handle colors indicate functions:

Needle and OS&Y valves:

BLACK = Isolate/Block RED = Vent/Bleed Ball valves:

Blue = Isolate/Block RED = Vent/Bleed

Instrument Single Block and Bleed Valves

Features

Utilising bar stock body

Combines piping & instrument valves in one body

Weight, space and cost saving over traditional designs

Standard high performance bonnet design

Blowout-proof valve stems and needles

Combinations of ball valves and needle valves in various configurations

Complete traceability of materials       

Bleed port equipped with plug       

Optional port sizes and threads available

Block: ball valve     Bleed: ball valve

Injection Double Block & Bleed Valves

Function-injection

 Injection of chemicals and other media into the process stream can be accomplished with this design A check valve is installed to prevent process fluid from reaching the inlet injection position. There is a 0.125″ hole in the injection nozzle orifice. The length of the injection nozzle orifice can be manufactured to meet customer requirements and needs to be specified. The injection orifice can also be rotated. Injection valves can be provided in most of the styles and options offered for the DBB ranges.

Injection Quill

The injection quill length (L) is manufactured to meet customer requirements. The injection nozzle is a 0.125″ diameter hole (standard).

Integral Check Valve

This poppet type spring return valve has a FKM soft seal (standard)

To order Injection Double Block & Bleed Valves,add “-IN” suffixes to ordering number, for example:

DBB1-BBN-RF12900-FNPT8-8P-316-IN

Sampling Double Block & Bleed Valves

 Function-sampling

 This design is developed to remove a sample directly from process stream at full system pressure. The customized sampling probe extends from the pipe flange connection for correct sample removal. Sampling valves can be provided without a probe and valves can be provided in most of the styles and options offered for the DBB ranges.

Process    

Outlet

Vent Vent

Sampling Probe

The sampling probe length (L) is manufactured to meet customer requirements.

To order Injection Double Block & Bleed Valves,add “-SA” suffixes to ordering number, for example: DBB1-BBN-RF12900-FNPT8-8P-316-SA