End Connected Gages With
DOUBLE UNION VALVES

Figure 4-3

Figure 4-4

Gage Size		Visible Length		(A) Overall Length			(C2) Minimum Valve Centers			Valve Centers shown here are as close together as practical, using the shortest nipples recommended. Longer centers may be obtained by using longer nipples. See Formula. B2=Valve Take Out Model 25P: 2.75" F2=Valve Offset Model 25P: .75" offset permits a cleaning brush to enter INFERNO gage from vent or drain port of Valve with open passage through valve body, "offset" from valve stem. This allows blow-down & clean-out while valve stem is closed. N1 = N2 = 1.5" Valve Centers (C) calculated using 1-1/2" long nipples between INFERNO Gage & Valves at Top & Bottom. Shorter C-C may be obtained by using "Close Nipples" which are 1-1/8" long for 1/2" Ø pipe and 1-3/8" long for 3/4" Ø pipe, although this practice is not recommended because the Gage will butt to the Valve with no room for further tightening. Adjustment Floating tailpiece on Valve allows adjustment of Center-to-Center (C-C) of the complete Valve-Gage-Valve assembly. Double Union Valves such as 25P and 25J offer approx. ±3/16" or less adjustment. Some valves have no means of adjustment.
# Sections	Nominal Glass Size	Inches	(mm)	Inches	(mm)		Inches	(mm)
1	1	3.75	95	5.25	133		11.5	292
1	2	4.75	121	6.25	159		12.5	318
1	3	5.75	146	7.25	184		13.5	343
1	4	6.75	171	8.25	210		14.5	368
1	5	7.875	200	9.375	238		15.625	397
1	6	9.125	232	10.625	270		16.875	429
1	7	10.25	260	11.75	298		18	457
1	8	11.875	302	13.375	340		19.625	498
1	9	12.625	321	14.125	359		20.375	518
2	4	15	381	16.5	419		22.75	578
2	5	17.25	438	18.75	476		25	635
2	6	19.75	502	21.25	540		27.5	699
2	7	22	559	23.5	597		29.75	756
2	8	25.25	641	26.75	679		33	838
2	9	26.75	679	28.25	718		34.5	876
3	6	30.375	772	31.875	810		38.125	968
3	7	33.75	857	35.25	895		41.5	1054
3	8	38.625	981	40.125	1019		46.375	1178
3	9	40.875	1038	42.375	1076		48.625	1235
4	7	45.5	1156	47	1194		53.25	1353
4	8	52	1321	53.5	1359		59.75	1518
4	9	55	1397	56.5	1435		62.75	1594
5	7	57.25	1454	58.75	1492		65	1651
5	8	65.375	1661	66.875	1699		73.125	1857
5	9	69.125	1756	70.625	1794		76.875	1953
6	8	78.75	2000	80.25	2038		86.5	2197
6	9	83.25	2115	84.75	2153		91	2311
7	8	92.125	2340	93.625	2378		99.875	2537
7	9	97.375	2473	98.875	2511		105.125	2670
8	8	105.5	2680	107	2718		113.25	2877
8	9	111.5	2832	113	2870		119.25	3029
9	8	118.875	3019	120.375	3058		126.625	3216
9	9	125.625	3191	127.125	3229		133.375	3388
10	8	132.25	3359	133.75	3397		140	3556
10	9	139.75	3550	141.25	3588		147.5	3747