DualRange Control Valve

Dia-FloŽ Diaphram Valves
DualrangeŽ Control Valve

The Dualrange Control Valve combines the standard features of the weir diaphragm valve with increased rangeability. Utilizing a unique two-piece compressor design, the Dualrange Control Valve has greater rangeability and controllability than typical diaphragm valves. Notable applications and benefits are as follows:

Control: The unique bonnet design encompasses two nested compressors as opposed to one utilized in conventional diaphragm valves. The individual movement of each compressor allows an increase in rangeability over conventional diaphragm valves. When an increase in flow is desired, the inner compressor moves completely upward, followed by the outer compressor. This dual movement allows greater variance in the flow path cross-sectional area, which directly corresponds to greater variances in flow hence increased controllability is achieved.
Cleanability: The streamlined flow path allows the control of high purity services while still maintaining stringent cleanliness requirements.
Slurries and Abrasives: Given the relative absence of cavities and crevices, the Dualrange Control Valve is ideal for controlling slurries up to 15% in solid concentration.
Positioners: The ITT Conoflow and Moore Products positioners are available as standard with the Dualrange Control Valve. Other positioners are available upon request.
Maintenance: The Dualrange utilizes standard Dia-Flo actuators and weir diaphragms. Therefore, part interchangeability and maintenance are standardized. Typically, only periodic lubrication and diaphragm and 0-ring replacement are required.
Control Valve Sizing: To optimize the desired control within your system parameters, please contact us to perform sizing calculations and offer valve recommendations.
Sizes: The Dualrange is available with all weir style bodies and diaphragms in sizes 1" to 6"

Dualrange^{^Ž} vs. Conventional Weir Valve

Dualrange^{^Ž}	Conventional	Dualrange^{^Ž}	Conventional

Fine Throttling		Full Open
When an increase in flow is desired, the inner compressor moves completely upward, followed by the outer compressor. This dual movement allows greater variance in the flow path cross-sectional area, which directly corresponds to greater variances in flow hence increased controllability is achieved.

Pressure/Temperature Curves

Solid Plastic Body with Dualrange Actuator

Weir Body with Dualrange Actuator

Dualrange^{^Ž} Control Valve Cv Ratings

Flanged - Unlined								Flanged - Plastic Lined
% OPEN	3/4 - 1	1-1/2	2	2-1/2	3	4	6	% OPEN	3/4 - 1	1-1/2	2	2-1/2	3	4	6
10	1	2	4	8	14	24	65	10	1	3	4.5	7	16	20	70
20	3.2	8	9	18	27	47	125	20	2.8	8	11	17	34	55	145
30	5.2	14	14	28	42	70	255	30	4.7	13	16	28	52	80	280
40	7.4	21	19	52	68	130	365	40	6.6	21	27	50	84	125	430
50	9.4	33	33	78	97	185	445	50	8.2	32	43	75	125	190	540
60	13	43	50	105	120	245	515	60	9.5	37	60	88	150	240	610
70	18	50	62	130	145	275	550	70	10	38	68	97	160	270	655
80	21	52	69	150	160	295	570	80	11	39	69	100	170	285	680
90	22	54	70	160	175	305	590	90	10	38	69	100	175	290	690
100	22	56	70	160	190	310	600	100	10	38	67	100	175	285	690

Flanged - Soft Rubber Lined								Flanged - Hard Rubber Lined
% OPEN	3/4 - 1	1-1/2	2	2-1/2	3	4	6	% OPEN	3/4 - 1	1-1/2	2	2-1/2	3	4	6
10	0.5	3.0	3.5	6.0	12	22	65	10	0.5	3.5	6	10	12	25	65
20	1.6	8.0	10	15	26	41	125	20	3	10	12	20	26	50	130
30	3.2	14	17	25	39	60	250	30	5.9	16	17	30	40	71	275
40	5.5	20	23	47	55	105	350	40	8.3	26	22	49	57	130	430
50	6.2	29	33	76	77	155	405	50	10	29	37	65	84	190	530
60	6.9	28	47	95	99	195	450	60	11	29	51	84	110	230	570
70	7.1	26	54	105	120	220	485	70	11	30	60	96	125	245	590
80	7.2	26	54	110	135	240	505	80	11	30	60	105	145	250	620
90	7.1	25	52	110	145	245	510	90	10	31	59	110	155	260	625
100	7.0	25	50	110	155	250	515	100	10	31	55	115	160	260	625

Flanged - Glass Lined
% OPEN	3/4 - 1	1-1/2	2	2-1/2	3	4	6
10	1.4	3	3	8	12	24	98
20	3.8	9	9	18	32	50	190
30	6.2	16	17	28	48	77	370
40	8.6	26	25	56	84	145	520
50	12	40	40	85	135	210	640
60	18	51	62	115	185	270	750
70	22	54	75	140	220	335	805
80	22	55	82	155	240	395	835
90	22	54	82	180	245	415	845
100	22	53	78	180	250	850	850

If you would like more information on the ITT Dualrange^{^Š} control valve, please contact your
local sales office or use our feedback form.

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