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Used for quick on-off service with a visual indication of flow. Features a floating ball design, encapsulated replaceable seats and check seals to ensure leak-tight service and extended service life.
Unit of Measure

Specifications

Series

7188

Type

Ball Valve

Body Style

Globe

Body Material

316 Stainless Steel

Seat Material

Filled TFE

Seat Washer Material

Viton®

Inlet

1/2" Gyrolok®

Outlet

1/2" Gyrolok®

Max. Operating Pressure

2000 psig138 bar

Operating Temperature

-20 to 425 ºF-29 to 218 ºC

Orifice Size

0.250 in

Flow Coefficient (Cv)

0.80

Typical Applications

N/A

  • Instrument panels
  • High pressure instrument lines
  • Gas sampling in pilot plants
  • Full flow and shutoff in chromatographs
  • Hydraulic test stands
  • Gas sampling cylinders
  • Handling corrosive and viscous fluids

Features & Benefits

N/A

  • Quarter turn handle provides a visual indication on of on/off valve position, improving safety.
  • Dual encapsulated TFE seats and microfinished ball ensure a leak tight seal. This combination provides greater valve reliability.
  • Dyna-Pak® packing provides a leak-tight seal with low operating torque in vacuum or high pressure applications, helping to prevent fugitive emissions.
  • Floating ball provides pressure-assisted sealing and temperature wear compensation for longer valve cycle life and greater value.
  • A wide variety of Hoke Gyrolok® end fittings or pipe fittings provide the correct fitting option for the application.

Materials of Construction

N/A


DESCRIPTION BRASS 316 STAINLESS STEEL MONEL®
1 Body Brass 316 stainless steel Monel®
2 Ball 316 stainless steel 316 stainless steel Monel®
3 Stem 316 stainless steel 316 stainless steel Monel®
4 Stem packing
7188 Series

Other valves
 



TFE/316 stainless steel
wafers
 
Dyneon™ TFM 1700

TFE/316 stainless steel
wafers


TFE/Monel® wafers
5 Seats:
7115 & 7155 Series
7122 & 7142 Series
7188 Series

PCTFE
TFE
 
PCTFE
TFE
Filled TFE
 
PCTFE
TFE
6 Seat retainers Brass  316 stainless steel Monel®
7 Seat washers†
7115, 7155 & 7188 Series
7122 & 7142 Series

Viton®
TFE
 
Viton®
TFE
 
Viton®
TFE
8 End fitting gaskets
7188 Series
Other valves
 

TFE
 
Dyneon™ TFM 1700
TFE
 

TFE
9 Handle  Nylon Nylon Nylon
10 Panel mounting nut
7115 Series
Other valves
 
Nickel-plated brass
Nickel-plated brass
 
Nickel-plated brass
316 stainless steel
 
Nickel-plated brass
Nickel-plated brass
All 6000 psig valves come with long red handles for reduced operating force. All other models have ashort blue handle.
† Other elastomers are available upon request. Contact your local distributor for details.