# 77V Series Filter Housing

> Fil-Trek Gas Housings. Canonical page: https://www.fil-trek.com/products/gas-housings/77v

Category: Gas Housings
Series: 77V

## Overview
The 77V Series moves gas upward through the elements from inside to outside. Coalesced liquid drains from the vessel while clean gas leaves the housing. The standard arrangement accepts single or multiple 336 elements, with other sizes available.

## Key Features
- Single-stage coalescing and separation
- Inside-to-outside flow through the elements
- Drain connections for coalesced liquid

## Applications
- Air & Gas
- Oil & Gas

## Specifications
- **inlet outlet:** Flange
- **dirty drain:** 1" - 2" NPT
- **clean drain:** 1" - 2" NPT
- **vent:** ½" NPT on all sizes
- **gauges:** ½" NPT on all sizes
- **closure:** Swing bolt closure, *Limited to pressure class
- **headlift:** Mechanical Davit on 77V12 and larger, Hydraulic Davit on 77V40 and larger
- **legs:** Skirt
- **material construction:** Carbon Steel, Stainless 304, Stainless 316, Duplex 2205, Super Duplex 2507, Hastelloy C276, Monel 400
- **certifications:** ASME, PED, CRN
- **internal lining:** None, Ceramic, Epoxy, PFA, ETFE (i.e. Tefzel), ECTFE (i.e. Halar), PVDF (i.e. Kynar), Rubber Lined
- **special service:** None, Sour Service, Lethal Service
- **feature:** Inside-Out Flow
- **max temperature:** 400°F (204°C)

## Options
- **configuration options:** (-) A – Side In/Side Out*, D - Same Side In/Out
- **finish options:** (-) External paint "National Blue" (CS)*, (-) Bead Blast (SS304 and SS316)*
- **closure options:** (-) Swing Bolt (O-Ring Seal)*, ANSI Bolted Cover (Gasket Seal), Yoke Cover (O-Ring Seal), Quick Opening Threaded Cover (O-Ring Seal), Quick Opening C-Clamp Cover (O-Ring Seal), Grooved, *Based on standard of construction, **See pages 5–6 of the downloadable 77V datasheet for closure options
- **seal options:** (-) Buna-N*, EPDM, Viton, Silicone, Teflon encapsulated Viton, Teflon
- **filter configuration:** Double Open End (std)*
- **accessories:** Direct Reading Gauge, DP Gauge, Safety Relief Valves, Vent Valves, Drain Valves
- **standard configuration note:** *Indicates standard configuration
- **filter support options:** (-) SS304 support post (Std)*, SS316 support post
- **leg options:** (-) Skirt (Std)*, Leg tabs, Angle Iron Legs

## FAQs

### What elements fit the 77V coalescer housing?
The 77V accepts CF Series and FG Series gas coalescing elements for removing liquid aerosols, oil mist, and condensates from wet gas streams. Confirm the selected element’s flow direction and installation configuration with Fil-Trek before ordering.

### What is the difference between 70V and 77V housings?
The 70V is for dry gas particulate removal (outside-in flow), while the 77V is for wet gas coalescing/liquid separation (inside-out flow) with integrated sump for liquid collection.

### What special service options are available?
77V housings can be built to sour service (NACE MR0175) and lethal service specifications when required for H2S-containing or toxic gas applications.

## Downloads
- [Datasheet](https://www.fil-trek.com/products/datasheets/Fil-Trek_Multi-Element-Gas-Filter-Housing_77V_datasheet.pdf)

## Contact
- **sales@fil-trek.com** — all filtration product inquiries, projects, filter housings, and filtration systems
- **filters@fil-trek.com** — replacement filter media, filter elements, filter bags, hardware, and spare parts

## Links
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- Markdown: https://www.fil-trek.com/products/gas-housings/77v.md
- Category: https://www.fil-trek.com/products/gas-housings
- Request Quote: https://www.fil-trek.com/contact?product=77v&category=gas-housings