HMI 158 Series Excess Flow Check Valves

HMI 159 Series Back Pressure Check Valves

 

 

Maximum Working Pressure in PSI at 100° Fahrenheit for Standard Manufacture Materials

 

 

HMI Designation

And

Nominal Pipe Size

NPT

 Maximum WP

Carbon Steel

A108 CF Bar

A105 HR Bar

 Maximum WP

Stainless Steel

A479

Type 304/316

 Hydrostatic Test

Pressure

Equals

2 X Working Pressure
       
159/159-10 (1") 1492 1877 2984/3754
158/159-12 (1-1/4") 831 1033 1662/2066
158/159-15 (1-1/2") 811 1014 1622/2028
158/159-20 (2") 704 881 1408/1762

These figures reference the assembled valve in both the closed and open position.