KMR & KHR Reflex Level Gauges and Valves
KENCO Flat Glass Gauges are used where direct visual observation of process fluids is required. These gauges are suitable for a wide range of applications with pressures up to 4000psig at 100°F, and temperatures up to 750°F at 2300psig. KENCO gauges are available in a wide variety of construction materials, connections and other options to meet most specifications.

Flat Glass Level Gauge Manual
Flat Glass Gauge Valve Manual
Related Documents
Five Main Components to All Flat Glass Gauges
- Chamber: Center of the gauge, and is the part that primarily contains the process fluid. It is machined from bar stock. The gasket seat is recessed for lateral support, and easy positioning.
- Glass: Provides the visual interface between the process fluid and the outside.
- Cover: Protects the glass, and provides the compression surface for sealing the gauge. The cushion seat is surfaced for lateral support and easy positioning.
- Gasket/Cushion: Provides for a seal between the chamber and glass (gasket), and protects the glass from mechanical stresses from the cover (cushion). For a given gauge, the gasket and cushion are normally the same material.
- Bolts/Studs/Nuts: Provides a uniform compression load to the gauge for pressure sealing.
Reflex Style Level Gauge
Why Use Flat Glass Gauges
Other Features
- They do not need electrical power to operate. This can be a great advantage in the case of a power outage.
- Simple to install – no calibration is necessary.
- Can be used as a reference to check, or calibrate, other level technologies.
- Pressure rating from vacuum to 4000psig.
- Temperature rating from -150°F to 750°F
- Not affected by the chemical or electrical properties of the process liquid. Specific gravity, dielectric, conductivity, surface turbulence, vapor, foam, etc. no longer needs to be considered.
Flat Glass Gauges vs. Tubular Glass Gauges
Medium Pressure Flat Glass Gauges
High Pressure Flat Glass Gauges
Flat Glass Gauge Valves (Gauge Cocks)
Series Kmv Valve Standard Features
- Safety Shut-off Ballchecks (Horizontal)
- Integral Bonnet
- Gauge Connection
- Union Vessel Connection
- Integral Seat
— Model KMVR — Rigid
— Model KMVU — Union
Series Khv Valve Standard Features
- Safety Shut-off Ballchecks (Horizontal)
- Union Bonnet
- Gauge Connection
- Union Vessel Connection
- Threaded Renewable Seat
— Model KHVR — Rigid
— Model KHVU — Union
Pressure/Temperature Ratings
- Model KMVx Valves are rated to 2500psig @ 100°F; 1400psig @ 750°F
- Model KHVx Valves are rated to 4000psig @100°F; 1500psig @ 750°F; KHVx valves also carry a steam rating of 450 WSP
Other Gauge Accessories
The KENCO Frost-proof Extension is used in low temperature applications where frost has a tendency to build up on the gauge. This extension prevents frost from covering the window, maintaining visibility at all times. The Frost-proof Extension consists of clear, plastic block that is in direct contact with the glass, and extends beyond the cover so that frost build-up does not block the glass. Mounting is easy, and can be added to any Reflex or Transparent gauge in the field. The extension can be installed or removed for cleaning while the gauge is in service.
Gauge Glass Options
KENCO supplies tempered borosilicate glass as standard in all Flat Glass Gauges. Borosilicate glass is suitable for most chemicals, and is good for temperature ranging from -425°F to 600°F (glass rating only). The tempering process improves the thermal shock resistance of the glass. Aluminosilcate glass is offered as an option for higher temperature applications. It offers less thermal expansion, as compared to borosilicate glass. Aluminosilicate glass is good for temperatures ranging from -425°F to 800°F (glass rating only). However, due to the added cost, it is only recommended for temperatures from -600°F to 800°F.
Glass Shields
For corrosive or steam applications, KENCO offers shields to extend the life of the glass in transparent gauges. The shields are made from either PCTFE (Kel-F) or Mica. Mica shields are recommended for steam service. Kel-F shields should be used in corrosive fluid applications. The shield is placed on the process side of the glass. Shields can only be used with transparent gauges.
Thermal Insulators and Gauge Scales
KENCO offers a wide variety of methods to heat or cool gauges in order to maintain the temperature of the process in the gauge. Internal & external heating/cooling tubes, thermal jackets, and insulation blankets are available. Gauge scales can be supplied to provide a numerical reference to the level being measured. Contact KENCO for more information.
Specifications
K = KENCO Flat Glass Gauge
Gauge Style
R = Reflex
T = Transparent
Glass Sizes
1 – 9
Connection Location
E = End
R = Side (Right)
L = Side (Left)
B = Back
Process Connection Type
N = FNPT
S = Socket Weld (Female)
A = 150# ANSI Flange
B = 300# ANSI Flange
C = 600# ANSI Flange
D = 900# ANSI Flange
E = 1500# ANSI Flange
F = 2500# ANSI Flange
Gauge Type
M = Medium Pressure
H = High Pressure
Gauge Sections
1 – 9
Materials of Construction
C = Carbon Steel
W = Stainless Steel (Wetted)
A = Stainless Steel
S = Special (Please Specify)
Process Connection Size
.50 = ½”
.75 = ¾”
1 = 1″
1.5 = 1½”
2 = 2″
3 = 3″
4 = 4″
6 = 6″
8 = 8″
Product Views



