Process Valves > Control Valves > Lowflow Mark 8000

 

Lowflow Mark 8000 Globe-Style Pneumatic Fractional Flow Control Valve

Lowflow's Mark 8000 is a family of heavy-duty control valves specifically designed for process applications requiring full flow or fractional flow control. Available in a wide selection of body sizes and styles, this valve can be configured in two-way or three-way designs, for diverting or mixing service, and with globe or angle valve style seats. It can be ordered with a bellows stem seal, with an extended bonnet extension for cryogenic use to -425°F, or with an electric actuator.

The Mark 8000 Series valve subassembly is manufactured completely from barstock, which combined with the standard heavy duty yoke and actuator, gives the valve the ability to handle pressure up to 6000 PSI, while still being able to offer Cvs ranging from 0.05 to 17.

Key Specifications

  • Heavy-duty barstock construction for pressures up to 6000 PSI
  • Ideal for corrosive or harsh process environments
  • Globe design to 2" angle pattern to 1"
  • In-line maintainable for quick, easy trim repairs
  • ANSI shutoff Class III for Cv <3.5, Class IV for Cv 3.5 or higher

Specifications, Manuals, and Supporting Literature

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Model Selection Guide

Use this table to find the right model for your application.  Don't see the option you need? Call a Lesman sales specialist at 800-953-7626

Make one selection from each section of the chart. A finished model number
will look like this: 8000G050CB/PTT6AEA30000AD00

Description Catalog Number
Fractional Flow Control Valve, Threaded Ends, Teflon Packing, with Air Regulator
Model Two-Way Globe Valve 8000G-
Size and Body
Material
1/2" Carbon Steel
1/2" Stainless Steel
3/4" Carbon Steel
3/4" Stainless Steel
1" Carbon Steel
1" Stainless Steel
1-1/4" Carbon Steel
1-1/4" Stainless Steel
1-1/2" Carbon Steel
1-1/2" Stainless Steel
2" Carbon Steel
2" Stainless Steel
050CB/PTST
050SB/PTST
075CB/PTST
075SB/PTST
100CB/PTST
100SB/PTST
125CB/PTST
125SB/PTST
150CB/PTST
150SB/PTST
200CB/PTST
200SB/PTST
Plus and Seat Standard: Linear Hard
Standard: =% Hard
A
B
Flow Coefficient
(Cv)
0.05
0.1
0.2
0.5
1.0
1.5
1.8
2.0
3.0
3.5
4.0
4.3
6.5
7.1
9.0
12.5
16.0
17.0
25.0
A
B
C
D
E
M
N
F
P
Q
G
R
H
S
I
T
J
U
K
Range 3-15 Direct Acting (Valves <1.5")
3-15 Direct Acting (Valves 1.5" or 2")
3-15 Reverse Acting (Valves <1.5")
3-15 Reverse Acting (Valves 1.5" or 2")
A30000A
A50000A
B30000B
B50000A
Action Direct Air-to-Close
Direct Air-to-Open
D00
R00

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