5
7KHGLIIHUHQWLDOUHOLHIYDOYHUHVSRQGVWRERWKFRQWUROOHG
SUHVVXUHDQGORDGLQJSUHVVXUHDQGRSHQVRUFORVHV
DVWKHVHSUHVVXUHVFKDQJH,IWKHORDGLQJSUHVVXUH
LQFUHDVHVSUHVVXUHRQWKHXSSHUVLGHRIWKHGLDSKUDJP
LQFUHDVHV7KHYDOYHSOXJPRYHVFORVHUWRWKHRUL¿FH
DQGUHVWULFWVWKHÀRZWKURXJKWKHUHOLHIYDOYH:KHQ
ORDGLQJSUHVVXUHGHFUHDVHVSUHVVXUHRQWKHXSSHU
VLGHRIWKHGLDSKUDJPGHFUHDVHV7KLVDOORZVWKHYDOYH
SOXJWRPRYHDZD\IURPWKHRUL¿FHDQGDOORZPRUHÀRZ
WKURXJKWKHGLIIHUHQWLDOUHOLHIYDOYHWRDWPRVSKHUHRU
EDFNLQWRWKHV\VWHP7KHGLIIHUHQWLDOUHOLHIYDOYHRSHQV
DQGFORVHVLQUHVSRQVHWRFKDQJHVLQWKHFRQWUROOHG
SUHVVXUH,QWKLVZD\WKHGLIIHUHQWLDOSUHVVXUHEHWZHHQ
WKHFRQWUROOHGDQGXQFRQWUROOHGSUHVVXUHVLVPDLQWDLQHG
B($;/$9+'5.#5X9'(,-$.;
5HOLHIRUEDFNSUHVVXUHYDOYHVUHVSRQGWRFKDQJHVLQ
XSVWUHDPSUHVVXUH3UHVVXUHFKDQJHVUHJLVWHUXQGHU
WKHGLDSKUDJPVHH)LJXUHWKURXJKDUHJLVWUDWLRQKROH
LQWKHYDOYHERG\RUWKURXJKDQH[WHUQDOFRQWUROOLQH
:KHQWKHSUHVVXUHLQFUHDVHVDERYHWKHVSULQJVHWWLQJ
WKHSUHVVXUHXQGHUQHDWKWKHGLDSKUDJPRYHUFRPHVWKH
VSULQJFRPSUHVVLRQ7KLVFDXVHVWKHYDOYHSOXJWRPRYH
DZD\IURPWKHRUL¿FH7KHÀRZSDWKWKURXJKWKHYDOYH
LVRSHQDQGH[FHVVSUHVVXUHLVYHQWHG:KHQXSVWUHDP
SUHVVXUHGURSVEHORZVHWSRLQWWKHYDOYHFORVHV
'LIIHUHQWLDOUHOLHIYDOYHVDUHXVHGWRPDLQWDLQD
GLIIHUHQWLDOSUHVVXUHEHWZHHQWKHFRQWUROOHGSUHVVXUH
DQGORDGLQJSUHVVXUHRIDV\VWHP7KHVSULQJVHWWLQJ
GHWHUPLQHVWKHGLIIHUHQWLDO
[X25@ABC651234E=:51234EE=5FN=51234D=5]W@E5@]X51C@FD5
=WFBE2F^16:5F66C17DC5=WFBE2F^15^F6\C@65dN=C25FN=55
F7X>C5@EC51C@FD5=WFBE2F^165F656EX]N5F7X>C
6B2WN^ 1C@FD5=WFBE2F^16
^F6\C@
Figure 2. MR98 Series Operational Schematics (continued)
HXN@2XD56B2WN^
=WFBE2F^1
X2W[WHC
>FD>C5BDd^
DXF=WN^5B2C66d2C5
WNDC@5@FB
EFN=]ECCD
OUTLET PRESSURE
INLET PRESSURE
LOADING PRESSURE
HXN@2XD5DWNC5@FB
@ABC51234E=5]W@E5WN@C2NFD5B2C66d2C52C^W6@2F@WXN @ABC51234E=5]W@E5CZ@C2NFD5B2C66d2C52C^W6@2F@WXN