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H-Series User Manual Rev2021A 3

Installation - Mechanical

ANSI Flanges: Using H-Series meters at pressures greater than 500 psi (35 bar) requires anges. See the specications

and bolt torque table below. Max bolt kits are available for ange installations. Always use process uid compatible

lubricant on the o-ring to attach the tting to the meter.

Customer supplied angesMax Flange Bolt and Stud Kit

Max H-Series Meter

Meter

(Flange size)

Studs Torque For Line Pressure ft-lb (N-m)

See notes below

Qty Size 500 psi (35 bar) 3500 psi (245 bar)

H241LS (Class 600 Flange) 4 3/4”-10 24 (33)

H241MS* (Class 2500 Flange) 4 1-1/8”-7 256 (247)

H242LS (Class 900 Flange) 8 3/4”-10 24 (33)

H242MS* (Class 1500 Flange) 8 1”-8 219 (297)

ANSI Flange Stud Torque Requirements: This table shows the minimum torque required for a 2:1 tightening factor at

the indicated pressures using zinc plated studs and nuts.

Notes:

H-Series meters that are designated as “LS” may be mounted using their NPT treads.

For convenience, wafer style mounting can be made using the ange size and bolt specications listed above.

* Meters that are marked as “MS” must be mounted between anges. The studs and nuts listed in the table are provided

for use with the customer supplied anges.

ANSI Flange Diagram

Questions and Answers:

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Max H Series Specifications

General