Cv-values: L800ANSI300FTC2

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Series	Code	Description
LW Model D	L800ANSI300FTC2_Q	SERIES LG HIGH PERFORMANCE TRIPLE ECCENTRIC METAL SEATED BUTTERFLY VALVE, MODEL D, PRESSURE CLASSES ASME300 & PN25-40, DRIVE SHAFT AND TRUNNION DESIGN, FLOW BALANCING TRIM Q-DISC

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IMO

Technical bulletin

Neles™ Q-Disc™ is a flow balancing trim for Neldisc™ Model D butterfly valves. Q-Disc design features extreme flow balancing for control service. Dynamic torque effect from the flow has been significantly reduced allowing high pressure drop service. With Q-Disc, the pressure is distributed more evenly resulting in lower torque requirement and more effective contol of flow. Q-Disc design also provides market leading noise reduction even up to 12 dB. The Q-Disc add-on is integrated to the standard Neles™ Neldisc™ LW, LG and L6 Model D disc. The valve itself is the Neles™ Neldisc™ Model D metal seated triple eccentric high performance butterfly valve.

C_v-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
80	3	0	11.8	32.2	50.6	63.7	74.5	90	113	140	170	196
100	4	0	19.8	50.7	76.4	89.2	102.5	125	162	218	281	330
150	6	0	55.2	92	129	175	239	331	451	607	782	920
200	8	0	88.2	147	206	279	382	529	720	970	1250	1470
250	10	0	170	283	396	538	736	1020	1390	1870	2410	2830
300	12	0	232	386	540	733	1000	1390	1890	2550	3280	3860

C_v/d²-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
80	3	0	0.128	0.151	0.187	0.22	0.256	0.291	0.315	0.339	0.364	0.383
100	4	0	0.128	0.151	0.187	0.22	0.256	0.288	0.313	0.335	0.359	0.376
150	6	0	0.088	0.124	0.161	0.198	0.239	0.282	0.32	0.35	0.377	0.398
200	8	0	0.088	0.124	0.161	0.199	0.24	0.284	0.32	0.349	0.375	0.396
250	10	0	0.1	0.133	0.168	0.204	0.245	0.288	0.322	0.35	0.376	0.396
300	12	0	0.088	0.124	0.159	0.197	0.24	0.284	0.322	0.352	0.378	0.4

F_L-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
80	3	0	0.86	0.86	0.86	0.85	0.82	0.78	0.74	0.7	0.65	0.63
100	4	0	0.86	0.86	0.86	0.85	0.82	0.78	0.74	0.7	0.65	0.63
150	6	0	0.86	0.86	0.86	0.85	0.82	0.78	0.74	0.7	0.65	0.63
200	8	0	0.86	0.86	0.86	0.85	0.82	0.78	0.74	0.7	0.65	0.63
250	10	0	0.86	0.86	0.86	0.85	0.82	0.78	0.74	0.7	0.65	0.63
300	12	0	0.86	0.86	0.86	0.85	0.82	0.78	0.74	0.7	0.65	0.63

X_T-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
80	3	0	0.58	0.58	0.57	0.54	0.49	0.45	0.42	0.39	0.35	0.3
100	4	0	0.58	0.58	0.57	0.54	0.49	0.45	0.42	0.39	0.35	0.3
150	6	0	0.58	0.58	0.57	0.54	0.49	0.45	0.42	0.39	0.35	0.3
200	8	0	0.58	0.58	0.57	0.54	0.49	0.45	0.42	0.39	0.35	0.3
250	10	0	0.58	0.58	0.57	0.54	0.49	0.45	0.42	0.39	0.35	0.3
300	12	0	0.58	0.58	0.57	0.54	0.49	0.45	0.42	0.39	0.35	0.3

z-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
80	3	0	0.52	0.5	0.45	0.41	0.38	0.35	0.31	0.26	0.22	0.2
100	4	0	0.52	0.5	0.45	0.41	0.38	0.35	0.31	0.26	0.22	0.2
150	6	0	0.52	0.5	0.45	0.41	0.38	0.35	0.31	0.26	0.22	0.2
200	8	0	0.52	0.5	0.45	0.41	0.38	0.35	0.31	0.26	0.22	0.2
250	10	0	0.52	0.5	0.45	0.41	0.38	0.35	0.31	0.26	0.22	0.2
300	12	0	0.52	0.5	0.45	0.41	0.38	0.35	0.31	0.26	0.22	0.2

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File creation day: 22.4.2024 (day.month.year)

Cv-values

Cv/d2-values

FL-values

XT-values

z-values

C_v-values

C_v/d²-values

F_L-values

X_T-values