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HNG DN LP T COMPACT ORIFICE COMPAFLOW

I Gii thiu b o lu lng Compaflow Mt b o lu lng Compaflow cho hi nc, cht kh, gm cc phn:

II- V tr lp Compact Orifice

V tr lp tm Compact Orifice theo tiu chun ISO 5167:2003, ph thuc vo phn upstream c cc Fitting g m chn khong cch lp t ti thiu, m bo o lu lng chnh xc.

Bng 1: Khong cch lp t tng quan gia fitting, ng knh ng D, h s beta

Cc fitting trong on upstream Khong cch lp t upstream

Beta=0.4 Beta=0.65

Cn gim (2D-D) L1 5D 12D Cn tng (0.5D-D) L2 12D 28D

Un cong 90 L3 16D 44D 2 on un 90 cng mt phng L4 10D 44D 2 on un 90 khc mt phng L5 50D 60D

Ng ba L6 9D 36D Van (m ht 100%) L7 12D 18D

D = ng knh danh ngha ca ng ti v tr lp compact orifice Phn downstream = 5D

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5DL3

FLOW

UPSTREAM DOWNSTREAM

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III- Hng dn lp t cho lu cht: Hi nc

V tr lp t cn ng thng nm ngang, khong cch lp t ti thiu cho phn up stream xem Bng 1, v phn down stream l 5D

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IV- Hng lp t cho lu cht: Kh

V tr lp t cn ng thng nm ngang hoc thng ng, di l tng phn up stream xem Bng 1 , v phn down stream l 5D

Ron ch (Gasket graphite)

Mt bch (Flange)

FLOW

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V- Cch s dng 3 van Manifold

1- i vi hi nc:

Sau khi lp t ng h o lu lng, trc khi cp hi phi ng kho (vn theo chiu kim ng h) ht 3 van: van cn bng, van p cao, van p thp. Cp hi qua ng h o lu lng, m (vn ngc chiu kim ng h) van cn bng trc. Tip theo m 2 van p cao v van p thp cng lc, v u tay khong 50% hnh trnh hi nc ngng t in y trong ng tm compact-orifice, 10 pht sau m tip 2 van n ht hnh trnh. Cui cng kho van cn bng li. T lc ny ng h o lu lng bt u lm vic, gi nguyn v tr m 2 van p cao v p thp.

2- i vi kh:

Sau khi lp t ng h o lu lng, trc khi cp kh phi ng kho (vn theo chiu kim ng h) ht 3 van: van cn bng, van p cao, van p thp. Cp kh qua ng h o lu lng, m (vn ngc chiu kim ng h) van cn bng trc. Tip theo m 2 van p cao v van p thp cng lc, v u tay kh vo trong ng tm compact - orifice n ht hnh trnh. Cui cng kho van cn bng li. T lc ny ng h o lu lng bt u lm vic, gi nguyn v tr m 2 van p cao v p thp.

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