GRAT Electric Proportional Control Valve-GRAT Control Valve

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Classification：　Electric control valve

Product Name：　GRAT Electric Proportional Control Valve

Product Description：

As an automatic control equipment to regulate the technical parameters of flow, temperature, pressure, GRAT electric proportional control valve is suitable for various industrial automation computer control system, DCS system, and gauges, whose Main applications are industrial automation production process control fields. For example: Petrochemical refinery, crude oil pipeline, cooling steam turbine for power plant, lubricant oil supply, combustion air volume adjustment; environmental protection sewage treatment in the liquid conveying cut-off, switches, flow control and other industrial automation process control.

The Characteristics of the products

    ★The characteristics of flow control
    Unique V type structure for the plug solved the control stability problem of traditional ball valve. For the stability of flow regulation, the EQ% characteristics can make the open degree between the controlled object and the valve tend to linearity. When the valve opens, the flow increases very slowly. The plug type determines the valve properties, so different open type of plug , and so the same diameter of the valve has different CV values and flow characteristics.
    ★Long service life
    More than 50,000 operation life without fault, keep your system operating safely and reliably.
    ★The patent positioning technology
    PPD positioning technology completely solves the problem of poor positioning accuracy and a major application difficult of long time reliable operation.
    ★Miniature design
    Light weight: The overall structure of valve body makes the ultra short face-to-face dimension, and greatly reduced the overall weight, which is about 50% weight of the same type ball valve.
    Small volume: The valve is easy to install in any direction of the pipeline, which is suitable for various complex pipeline and working conditions.
    ★Good seal performance
    The valve owns the double sphere sealing to enhance sealing strength and effectively control the leakage to zero leakage. The sealing level is grade VI.
    ★The valve owns a self-cleaning function to effectively guarantee the piping circulating.
    The scissors opening between the valve seat and the trim can easily cut off all kinds of impurities in the pipeline to effectively guarantee the pipeline circulating.
    ★High modulation precision
    The valve has high modulation precision, large rangeability (Maximum 300:1), and excellent modulation performance to make it widely applied in various industrial fields for high precision adjustment.
    ★The new technology for Direct Debugging Switch(DDS) in electric actuators.
    Easy to use! Design by GRAT in China.
    It completely solved the problem of complex debugging and make the technology simpler.
    The debugging can be simplified from 5 steps to 1 step.
    The debugging for electrical and mechanical position can be easy achieved through rotating the knob on the top of the dial after electric actuators and valves are assembled together.

The parameters of the products

    Valve size: DN15-DN200（Please contact us for the larger diameter information.）
    Body ratings: PN1.6MPa
    Body connections: Flange
    Seat form: PTFE Soft seal
    Body material: SUS304 SUS316 WCB
    Stem material: SUS304 SUS316 WCB
    Action time: 15S, 30S（optional）（0-90°）
    Power supply: AC220V, AC380V, DC24V
    Control signal: 4～20mA, 0～5V
    Output signal: 4～20mA 0,～5V
    Operating pressure: PN1.6Mpa, PN2.5Mpa, PN6.4Mpa
    Medium Temp. ≤220℃
    Ambient Temp. ≤50℃
    Flow coefficient（CV）: Please download the data on our website for reference。(Custom flow coefficient depends on the customer’s requirement.)    Applicable medium: Food, lubrication, fibrous fluid, water, oil, gas.
    Dead zone: 0.5%
    Repeatability error: 0.5%

Product information

DN		L	D	K	D1	N-Md	B	I	H1	H2	W1	W2	Weight Kg
mm	inch	L	D	K	D1	N-Md	B	I	H1	H2	W1	W2	Weight Kg
15	1/2″	35	95	65	46	4-φM12	9	2	234	196	145	196	5.6
20	3/4″	38	100	75	56	4-φM12	12	2	242	196	145	196	6
25	1″	42	110	85	66	4-φM12	12.7	2	218	196	145	196	5.8
32	11/4″	52	133	100	78	4-φM16	14	3	231	196	145	196	6.7
40	11/2	61	145	110	87	4-φM16	15	3	238	196	145	196	7.6
50	2	73	160	125	99	4-φM16	16.7	3	251	196	145	196	8.7
65	21/2″	92	180	145	118	4-φM16	17.2	3	265	196	145	196	16.8
80	3″	109	195	160	136	8-φM16	19	3	298	255	184	255	18.6
100	4″	140	215	180	156	8-φM16	18.5	3	310	255	184	255	21.2

DN		D	G	L	H1	W1	W2	Weight Kg
mm	inch	D	G	L	H1	W1	W2	Weight Kg
8	1/2″	8	14.3	65	177	196	145	5.0
10	3/4″	10	18	65	177	196	145	5.2
15	1″	15	22	72	188	196	145	5.3
20	11/4″	18	28	85	190	196	145	5.5
25	11/2	24	34.5	91	200	196	145	5.3
32	2	30	43.5	110	205	196	145	5.9
40	1/2″	38	49.5	122	212	196	145	6.2
50	3/4″	48	62	145	220	196	145	7.2

DN(mm) 1.6Mpa	L	D	K	D1	n-Φd	b	f	H1	H2	W1	W2	Weight kg
15	130	95	65	46	4-Φ14	14	2	250	50	196	145
20	140	105	75	56	4-Φ14	16	2	255	55	196	145
25	150	115	85	65	4-Φ14	16	2	260	60	196	145
32	165	135	100	76	4-Φ18	18	3	270	70	196	145
40	180	145	110	84	4-Φ18	18	3	275	75	196	145
50	200	160	125	99	4-Φ18	20	3	285	85	196	145
65	220	180	145	118	4-Φ18	20	3	350	95	255	184
80	250	195	160	132	8-Φ18	20	3	360	100	255	184
100	280	215	180	156	8-Φ18	22	3	370	110	255	184
125	320	245	210	184	8-Φ18	22	3	380	125	255	184
150	360	280	240	211	8-Φ22	24	3	390	140	255	184
200	400	335	295	266	12-Φ22	24	3	420	170	255	184

The flow figure of several typical section shape and flow characteristics

The main technical parameters and indexes of body

Valve size DN(mm)		15	20	25	32	40	50	65	80	100	125	150	200
CV flow coefficient at a fully open （for reference）	“O” shape	24	44	84	122	198	320	443	595	1096	1692	2602	4212
	Rectangle	8.7	13.4	20	32.6	44.3	70	114	134	186	270	462	688
	“V” shape 30°	7.5	11	17	28	38	60	98	116	155	233	397	595
Flow characteristics		J rectangle: linearity, “V” shape（logarithm）EQ%, “O” shape: Quick open
Body rating MPa		16（1.6MPa）、40（4.0MPa）、64（6.4MPa）
Adjustable rate		50:1 100:1 300:1
Flange standard		Compliance with the standard JB78-59、JB-79-59；manufacture according to the standard JB/T79.1、JB/T79.2-94
Body material		Casting steel（ZG230-450）、Stainless steel（ZG1Cr18Ni9Ti、316、316L）、titanium alloy
Ball material		Stainless steel（ZG1Cr18Ni9Ti、316、316L、A105）etc.
Stem material		Stainless steel（ZG1Cr18Ni9Ti、316、316L）
Packing material		PTFE, Grafoil
Seal type		Soft seat						Metal seat
Seat material		PTFE			Carbon fiber intensified PTFE			Stainless steel or stainless steel+ STL
Leakage		Ⅵ degree						less than rated flow10-4、10-5
Operating Temp.		N: -40℃-180℃			M: -40℃-280℃			H: -40℃-400℃

The implementation standards of the electric control valve

Manufacturing standards	GB/T 122387-89
Flange standards	GB9113-2000, GB17241.6-1998
Structure length standards	GB12221-89
Inspection standards	GB/T 13927-92