Top Head and Overhead System

Assembly

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Automated top unheading device and the overhead line carrying cracked vapor to the coker fractionator.

Direct parts	6
Total parts	10
Used in	1 assembly
Class	Assembly

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Automated top unheading device and the overhead line carrying cracked vapor to the coker fractionator. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Top Head and Overhead System parts and their functions

6 top-level parts · 10 parts in total · full bill of materials below

Top Head and Overhead System parts diagram: 1 top unheading device, 2 overhead transfer line, 3 overhead quench ring, 4 overhead isolation valve, 5 top head actuator, 6 o-ring set. 10 parts in 6 top-level items. — Top Head and Overhead System parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.

#	Part	Qty	What it does
1	Top Unheading Device	1×	Automated top head closure
2	Overhead Transfer Line	1×	Transfer line to fractionator
3	Overhead Quench Ring	1×	Overhead vapor quench injection
4	Overhead Isolation Valve	2×	Overhead isolation valves
5	Top Head Actuator	1×	Hydraulic actuator for top head
6	O-Ring Set	4×	High-temperature seal kit

3D model

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Build & assembly graph

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Bill of materials for Top Head and Overhead System

6 top-level lines · 6 rows shown · 10 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Top Unheading Device	coker-top-unheading-valve	1×	1	·	part
2	Overhead Transfer Line	coker-overhead-line	1×	1	·	part
3	Overhead Quench Ring	coker-overhead-quench-ring	1×	1	·	part
4	Overhead Isolation Valve	coker-spool-isolation-valve	2×	2	·	part
5	Top Head Actuator	coker-top-head-actuator	1×	1	·	part
6	O-Ring Set	oring-set	4×	4	·	part

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Where the top head and overhead system is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Oil, Gas & Process 1 Delayed Coker Drum

Used in 1 assembly

Delayed Coker Drum

Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $0.50–$100. How estimates work

Vendor	HQ	Specialty	MOQ	Lead time
🇨🇳Foxconn foxconn.com ↗	Shenzhen, CN	Electronics contract mfg	1,000 pcs	6–10 wks
🇸🇬Flex (Singapore) flex.com ↗	Singapore	Electronics contract mfg	1,000 pcs	6–10 wks
🇮🇳Dixon Technologies dixoninfo.com ↗	Noida, IN	Electronics contract mfg	1,000 pcs	6–10 wks
🇨🇳BYD Electronics bydelectronic.com ↗	Shenzhen, CN	Electronics contract mfg	1,000 pcs	6–10 wks
🇸🇬Venture Corp venture.com.sg ↗	Singapore	Electronics contract mfg	1,000 pcs	6–10 wks