{"id":5069,"date":"2021-09-02T06:00:19","date_gmt":"2021-09-02T06:00:19","guid":{"rendered":"http:\/\/nfstc.co.uk\/?page_id=5069"},"modified":"2024-09-30T11:51:25","modified_gmt":"2024-09-30T11:51:25","slug":"double-block-bleed-valves","status":"publish","type":"page","link":"http:\/\/nfstc.co.uk\/?page_id=5069","title":{"rendered":"Block & Bleed Valves"},"content":{"rendered":"\t\t
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Block & Bleed Valves<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Block & Bleed Valves Features<\/strong><\/p>

Introduction<\/strong><\/p>

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.<\/p>

Applications<\/strong><\/p>

Process piping isolation points<\/p>

Direct mount to instruments\u00a0\u00a0\u00a0<\/p>

Close coupling of instruments<\/p>

Double block and bleed isolation<\/p>

Vents and drains<\/p>

Maximum working pressure up to 10000 psig (689 bar)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/p>

Working temperature up to 1200\u2109 (649\u2103) with Graphite packing<\/p>

Colour coded valve function identification<\/p>

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<\/p>

Fire-tested design in accordance with BS 6755 part 2\/API 607<\/p>

Flanged connections comply with ASME B16.5 RF and RTJ<\/p>

Pressure ratings in accordance with ASME B16.34<\/p>

Ball Type Valve specification<\/strong><\/p>

Features<\/strong><\/p>

Maximum working pressure up to 10000 psig (689 bar)<\/p>

Working temperature are as follows:<\/p>

PTFE: -65\u2109 to 450\u2109 (-54\u2103 to 232\u2103 ) PEEK: -65\u2109 to 450\u2109 (-54\u2103 to 232\u2103 )<\/p>

Actuate at quarter-turn<\/p>

Directional stem flats show open or closed position<\/p>

Bottom-loaded stem prevents stem blowout and enhances system safety<\/p>

High-strength stem bearing provides smooth actuation and eliminates galling between valve stem and body<\/p>

It may be required to adjust the packing during the service life of the valve<\/p>

Hikelok ball valves are designed to be operated in a fully open\u00a0 or fully closed position<\/p>

Needle Type Valve specification<\/strong><\/p>

\u00a0Features<\/strong><\/p>

\u00a0<\/strong>Maximum working pressure up to 10000 psig (689 bar)<\/p>

Working temperature:<\/p>

PTFE packing: -65\u2109 to 450\u2109 (-54\u2103 to 232\u2103 ) Graphite packing: -65\u2109 to 1200\u2109 (-54\u2103 to 649\u2103 )<\/p>

Two-stem design: thread hardened upper stem and smooth surface<\/p>

hardened lower stem<\/p>

Upper stem thread lubricant is isolated from system fluid<\/p>

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<\/p>

Stem back seating seals in fully open position<\/p>

Panel mounting is available as an option<\/p>

Double lock-pins enable steady and durable fastening of the handle<\/p>

Handle of different colors are available for option<\/p>

OS&Y Needle Type Valve specification\u00a0<\/strong><\/p>

Features<\/strong><\/p>

The unique combination of do<\/p>

Maximum working pressure is 10’000psig (689 bar)<\/p>

Working temperature are as follows:<\/p>

PTFE: -65\u2109 to 450\u2109 (-54\u2103 to 232\u2103 )<\/p>

Graphite: -65\u2109 to 1200\u2109 (-54\u2103 to 649\u2103 )<\/p>

Two-stem design: thread hardened upper stem and smooth surface hardened lower stem<\/p>

Upper stem thread lubricant is isolated from system fluid<\/p>

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<\/p>

Bolted bonnet enhance strength and reliability<\/p>

Back seat design provides secondary stem sealing and prevents stem blowout<\/p>

Adjustable gland flange allows easy access to the packing gland and packing adjustment for an effective stem seal<\/p>

Investment case yoke is formed by precision casting which enhances strength and perfect stem alignment<\/p>

Two handle pins make the handle fixed firmly and lastingly<\/p>

Set S crew<\/p>

Handle colors indicate functions:<\/em><\/p>

Needle and OS&Y valves:<\/em><\/p>

BLACK <\/em>= <\/em>Isolate\/Block <\/em>RED <\/em>= <\/em>Vent<\/em>\/Bleed <\/em>Ball valves:<\/em><\/p>

Blue <\/em>= <\/em>Isolate\/Block <\/em>RED <\/em>= <\/em>Vent\/Bleed<\/em><\/p>

Instrument Single Block and Bleed Valves<\/strong><\/p>

Features<\/strong><\/p>

Utilising bar stock body<\/p>

Combines piping & instrument valves in one body<\/p>

Weight, space and cost saving over traditional designs<\/p>

Standard high performance bonnet design<\/p>

Blowout-proof valve stems and needles<\/p>

Combinations of ball valves and needle valves in various configurations<\/p>

Complete traceability of materials\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/p>

Bleed port equipped with plug\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/p>

Optional port sizes and threads available<\/p>

Block: ball valve\u00a0\u00a0\u00a0\u00a0 Bleed: ball valve<\/p>

Injection Double Block & Bleed Valves<\/p>

Function-injection<\/p>

\u00a0<\/strong>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.<\/p>

Injection Quill<\/p>

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

Integral Check Valve<\/p>

This poppet type spring return valve has a FKM soft seal (standard)<\/p>

To order Injection Double Block & Bleed Valves,add \u201c-IN\u201d suffixes to ordering number, for example:<\/p>

DBB1-BBN-RF12900-FNPT8-8P<\/strong>-316-IN<\/strong><\/p>

Sampling Double Block & Bleed Valves<\/strong><\/p>

\u00a0Function-sampling<\/strong><\/p>

\u00a0<\/strong>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.<\/p>

Process\u00a0\u00a0\u00a0\u00a0<\/p>

Outlet<\/p>

Vent Vent<\/p>

Sampling Probe<\/p>

The sampling probe length (L) is manufactured to meet customer requirements.<\/p>

To order Injection Double Block & Bleed Valves,add \u201c-SA\u201d suffixes to ordering number, for example: DBB1-BBN-RF12900-FNPT8-8P<\/strong>-316-SA<\/strong>\u00a0<\/strong><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Building Confidence Through Knowledge<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Block & Bleed Valves 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\u00a0\u00a0\u00a0 Close coupling […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","footnotes":""},"_links":{"self":[{"href":"http:\/\/nfstc.co.uk\/index.php?rest_route=\/wp\/v2\/pages\/5069"}],"collection":[{"href":"http:\/\/nfstc.co.uk\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/nfstc.co.uk\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/nfstc.co.uk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/nfstc.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5069"}],"version-history":[{"count":14,"href":"http:\/\/nfstc.co.uk\/index.php?rest_route=\/wp\/v2\/pages\/5069\/revisions"}],"predecessor-version":[{"id":8961,"href":"http:\/\/nfstc.co.uk\/index.php?rest_route=\/wp\/v2\/pages\/5069\/revisions\/8961"}],"wp:attachment":[{"href":"http:\/\/nfstc.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5069"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}