A training manual in conducting a workshop in the design, construction, operation, maintenance and repair of hydrams
 Session 10: Hydram construction - concrete (18 hours over a 7 day period)
 Handout 10A: Concrete hydram design parameters Handout 10B: Thickness of the impulse valve plate - inches Handout 10B: Thickness of the impulse valve plate - metric Handout 10C: Impulse valve steel backing - inches Handout 10C: Impulse valve steel backing - metric Handout 10D: Impulse valve seat width - inches Handout 10D: Impulse valve seat width - metric Handout 10E: Check valve backing thickness - inches Handout 10E: Check valve backing thickness - metric Handout 10F: Check valve seat width - inches Handout 10F: Check valve seat width - metric Handout 10H: Exploded view of 2- piece concrete hydram Handout 10I: Side view 2-piece concrete hydram Handout 10J: Two piece concrete hydram form Handout 10K: Two piece concrete hydram Handout 10L: One Piece Concrete Hydram Form Handout 10M: Problem Handout 10N: Materials and procedures

### Handout 10M: Problem

Attachment 10-M

A community of 100 people requires 20/gal/day/person, and 30 gpd/cow for 35 cows, and wants to use a concrete hydram.

h = 90'

H= 20'

A weir 2" wide and 4" deep has been put in the stream; 2' upstream from the weir, the distance form the mark on the stake, level with the top of the weir, to the water level is 1½" Assume an efficiency of 50%, determine the following:

· Q

· D

· d

· Accumulator diameter

· L

· Check valve opening

· Impulse valve opening

· T. s

· TL

· Impulse valve thickness

· Impulse valve seat width

· Impulse valve backing thickness

· Check valve seat width

· Check valve backing thickness

· Number and size of bolts