Picture of Mark 978LF Series Control Valve

Low flow, O-ring stem seal

Angle style control valve, for continuous precision control of gas, air, USP PW (purified water), CIP fluids in the biopharmaceutical, pharmaceutical, food & beverage and consumer health & beauty industries:

Small vessel process input control: clean compressed air and gas
Clean utilities: USP PW, CIP, clean compressed air and gas
F & B and Consumer H & B process: inputs, outputs, purified water and clean utilities

Features & Benefits

The smallest nominal flow offering in the industry. Six Cv’s between 0.005 and 0.1 enables you to control flow for any application
Maintenance friendly – easy to perform maintenance with simple disassembly, reassembly, and steam-in-place/clean-in-place capabilities
Mechanically and electropolished internal components – 20Ra (0,5µm) finish; others upon request
FDA and USP Class VI conformity on all process seal materials
Self-draining (no hold-up) – when mounted in either vertical or horizontal orientations

Specifications

Size: 1/2″ & 3/4″ (DN15 & DN20)
End Connections: ASME, DIN and ISO tri-clamp, extended tube weld
Cv (Kv) & Flow Characteristics: 0.005 – 0.1 (0,0043 – 0,086)
Pressure at Maximum Temperature: 200 psi (13,8 bar) at 300°F (149°C) dependent on o-ring construction
Wetted Material: ASME SA479 316L (UNS 31603) is standard. EN 10272:2000 GR 1.4435, AL-6XN®, Hastelloy C-22 and others are optional
Surface Finish: ASME BPE SF5, 20Ra (0,5µm) electropolish is standard, 8Ra (0,2µm) optional
Stem Seal – o-ring: various – all certified to FDA/USP Class VI

Documentation

Mark 978LF Series Data Sheet

Mark 978LF Series Dimensional Drawing

Mark 978LF Series Installation & Maintenance Manual

Steriflow Valve Product Overview Brochure

Steriflow Valve Product Overview Brochure - A4

Resources

Jorlon Facts and Warranty

The majority of Steriflow valves come with the Jorlon diaphragm and, of course, a lifetime diaphragm warranty.

View Resource

Approvals

CRN (Canadian Registration Number)
SEP Declaration (Sound Engineering Practice)
ATEX Certified
EC Declaration of Conformity
All products use FDA and USP Class VI approved soft goods and seals where possible. Consult each product data for details

STEP Files

Notice Regarding 3D STEP Files:
The 3D STEP files provided on this website contain proprietary information and are intended solely for use by authorized customers. These files must not be used, distributed, or repurposed by third-party vendors for promotional, marketing, or any other non-customer-related activities. Unauthorized use may violate intellectual property protections and confidentiality agreements.

Mark 978LF Series
1/2″ Mark 978LF Series with 14M Actuator
3/4″ Mark 978LF Series with 14M Actuator

1/2″ Mark 978LF Series with Actuator and Positioner
1/2″ Mark 978LF Series with 14M and 16IP Side Positioner
1/2″ Mark 978LF Series with 14M and 16IQ Side Positioner
1/2″ Mark 978LF Series with 14M and 16PP Side Positioner
1/2″ Mark 978LF Series (Jorlon Diaphragm) with 14M and 16IP Side Positioner
1/2″ Mark 978LF Series (Jorlon Diaphragm) with 14M and 16IQ Side Positioner
1/2″ Mark 978LF Series (Jorlon Diaphragm) with 14M and 16PP Side Positioner

3/4″ Mark 978LF Series with Actuator and Side Positioner
3/4″ Mark 978LF Series with 14M and 16IP Side Positioner
3/4″ Mark 978LF Series with 14M and 16IQ Side Positioner
3/4″ Mark 978LF Series with 14M and 16PP Side Positioner
3/4″ Mark 978LF Series (Jorlon Diaphragm) with 14M and 16IP Side Positioner
3/4″ Mark 978LF Series (Jorlon Diaphragm) with 14M and 16IQ Side Positioner
3/4″ Mark 978LF Series (Jorlon Diaphragm) with 14M and 16PP Side Positioner

Mark 978LF Series with Actuator and Top Positioner
1/2″ Mark 978 Series with 14M and Top Positioner
1/2″ Mark 978 Series (Jorlon Diaphragm) with 14M and Top Positioner
3/4″ Mark 978 Series with 14M and Top Positioner
3/4″ Mark 978 Series (Jorlon Diaphragm) with 14M and Top Positioner