Pneumatic diagram control valve manufacturered in China

Specifications Pneumatic diagram control valve

CE ISO

high quality

pressure class:1.6MPa,4.0MPa,6.4MPa

    Product Description           Pneumatic diagram control valve           1.General                                                                                                                             Pneumatic diaphragm control valve is the terminal industrial process measurement and control system control device, is composed by pneumatic diaphragm actuator, direct through single-seat,double seat and sleeve valve, etc., which can automatically change the valve trim position according to the control signal system , changing the flow area between the valve trim and the valve seat, to change the valve drag coefficient, to realize the regulation for the medium flow, pressure and level and other process parameters adjustment. 
Pneumatic diaphragm valve use dual-oriented structure, equipped with multiple spring actuator, with a compact, light weight, sensitive, valve capacity big, flow characteristics of precision, easy to disassembly. Widely used for precise control of gas, liquid, steam and other media, process parameters such as pressure, flow, temperature, level maintained at a set value. Especially for the smaller amount of pressure and small leakage workplace.   2.technical performance and data                                                                                       control valve data (1)valve body material-cast iron,cast steel and so on (2)pressure class:1.6MPa,4.0MPa,6.4MPa
(3)connected way:flange connection according to JB79-59
(4)temperature scope:normal-20C~+230C air cooling fin-60 C~+450C
(5)action way:positive (air to close type)or back action (air to open type)
(6)flow characteristic:equal percent/linear
(7)leakage:single seat 0.01%×rated Kv
(8)ouble seat,sleeve seat:0.5%×rated Kv   3.Structural principle                                                                                                           Pneumatic diaphragm valve including pneumatic diaphragm actuator and the control valve 
BZHP pneumatic control valve is a single-seat control valve with BZH pneumatic diaphragm actuator
BZHN pneumatic double seat valve is a double seat valve with BZH pneumatic diaphragm actuator 
BZHM pneumatic sleeve valve is a sleeve valve and BZH pneumatic diaphragm actuator   a. pneumatic diagram actuator For the structure and working principal,please take the reference for the manual b. control valve Control valve is contacted directly with the medium in the pipe, the valve trim act in the valve body,to change the flow area between the valve trim and the valve seat, which change the drag coefficient of the valve, thereby adjusting the process parameters.
Control valve is composed by up cover ,valve body, down valve cover, valve trim part,valve seat,stuff and plate.Please take reference of drawing 1 ,drawing 2
The action way can be divided into positive way (air to close type) and back way(air to open type).The valve will be from fully open to fully close when input signal pressure change from down limit value to upper limit value;The valve will be from fully close to fully open when input signal pressure change from down limit value to upper limit value;
Pneumatic control single seat valve with good performance of sealing and small leakage, the working pressure difference can not be too high due to the big unbalance force of valve trim
Pneumatic double seat control valve with the performance of big rated flow KV, small valve trim unbalanced force,stable operation and big pressure difference. It is widely used.But compare with single seat control valve, its leakage is bigger.
The stability and Cavitation resistance of Pneumatic sleeve control valve is better than single seat and double seat valve.
 4.pneumatic single seat control valve                                                                 

DN	20				25	32	40	50	65	80	100	125	150	200	250	300
Spool diameter(mm)	10	12	15	20	25	32	40	50	65	80	100	125	150	200	250	300
Rated flow Kv	1.2	2	3.2	5	8	12	20	32	50	80	120	200	280	450	700	1100
PN MPa	1.6        4.0        6.4
BZH pneumatic actuator model	BZHA/B-11				BZHA/B-22		BZHA/B-23		BZHA/B-34			BZHA/B-45			BZHA/B-56
Rated travel (mm)	10				16		25		40			60			100
Flow characteristic	Equal percent           linear
Action way	Air to open       Air to close
Temperature scope	-20℃~+230℃        -60℃~+450℃

Pneumatic diaphragm single seat control valve size chart  

DN		20	25	32	40	50	65	80	100	125	150	200	250	300
L	1.6MPa	181	184	184	222	254	276	298	352	415	451	600	650	740
	4.0MPa	194	197	197	235	267	292	317	368	425	473	610	670	770
	6.4MPa	206	210	210	251	286	311	337	394	435	508	650	690	800
H	normal temperature type	381	445	451	563	578	624	627	631	756	764	803	1039	1064
	Air cooling fin model	517	581	587	691	706	787	790	794	953	961	1000	1235	1259
A		236	285		285		360			470			620

  5.pneumatic double seat control valve                                                                               BZHN double seat valve data:

DN	25	32	40	50	65	80	100	125	150	200	250	300
Rated flow Kv	10	16	25	40	63	100	160	250	400	630	1000	1600
PN MPa	1.6         4.0         6.4
BZH pneumatic actuator model	BZHA/B-22		BZHA/B-23		BZHA/B-34			BZHA/B-45			BZHA/B-56
Rated travel (mm)	16		25		40			60			100
Flow characteristic	Equal percent         linear
Action way	Air to open         air to close
temperature℃	-20℃~+230℃         -60℃~+450℃

neumatic double seat control valve drawing  

DN		25	32	40	50	65	80	100	125	150	200	250	300
L	1.6MPa	185	200	220	250	275	300	350	410	450	550	670	770
	4.0MPa	190	210	230	255	285	310	355	425	460	560	740	803
	6.4MPa	200	210	235	265	295	320	370	440	475	570	750	819
H	Normal temperature type	450	453	573	578	634	644	656	781	791	833	1443	1519
	Air cooling fin type	586	589	701	706	797	807	819	978	988	1030	1745	1765
A		285		285		360			470			620

  6.pneumatic sleeve control valve                                                                                        BZHM sleeve valve data  

DN	25	40	50	65	80	100	125	150	200	250	300
Rated flow Kv	11/10	27/25	44/40	69/63	110/100	176/160	275/250	440/400	690/630	940/850	1200/1050
PN MPa	1.6             4.0             6.4
BZH pneumatic actuator model	BZHA/ B-22	BZHA/B-23		BZHA/B-34			BZHA/B-45			BZHA/B-56
Rated travel(mm)	16	25		40			60			100
Flow characteristic	linear / equal percent
Action way	air to open    air to close
Temperature scope	-20℃~+230℃                           -60℃~+450℃

Pneumatic sleeve control valve dimension drawing   

DN		20	25	32	40	50	65	80	100	125	150	200	250	300
L	1.6MPa	181	184	184	222	254	276	298	352	415	451	600	650	740
	4.0MPa	194	197	197	235	267	292	317	368	425	473	610	670	770
	6.4MPa	206	210	210	251	286	311	337	394	435	508	650	690	800
H	Normal temperature type	381	445	451	563	578	624	627	631	756	764	803	1063	1119
	Air cooling fin type	517	581	587	691	706	787	790	794	953	961	1000	1260	1319
A		236	285		285		360			470			620

  7.installation note                                                                                                               a.Control valve should be installed vertically on the pipe, if need to install horizontal or tilt,should be added support bracket.
b.When the nominal diameter is different from pipe size, should be added connector.
c.The environment condition should be good and temperature should be -25~+55℃
d.Should be installed on the site without vibration source, otherwise need to take some reinforce measures
e.When installing, the arrow direction of the valve body or flange should be the same with medium direction.
f.Before installation, the slag and the debris in the pipe should be cleaned out;after installation, should keep the valve trim opened in max, and clean up the pipe and control valve to avoid slag and debris damage to valve
g.Pneumatic control valve should be installed on the position where is easy to maintenance and repair.
h.In order to ensure the control valve and regulator system failure will not affect the production and security incidents , generally need to install a bypass and bypass valve. Bypass valve can be installed directly above the control valve , the bypass valve to prevent leakage of corrosive media to adjust the valve. Before the control valve, the shut-off valve must be installed for high temperature , high pressure, easy to cold, viscous media , but also the installation guide shower valve.   8.Model preparation                                                                                                                  Company Information   Forty years manufacture experience, the most professional manufacturer                         China Bell Automatic Group is the leader of automatic industry, specialized in manufacturing automatic products and equipments, owns many world advanced technology and many manufacturing factories and many famous brands.   Tianjin Bell Automatic Instrument Technology Co., Ltd is the subordinate company of China Bell Automatic Group, has forty years manufacturing and technical experience, is the most professional manufacturer in various control valves, actuators and instruments. Bell Automatic has got the ISO quality certificate, EU CE certificate, various quality certificates and many certificates of honor issued by Chinese government.               Packaging & Shipping   Package:with high quality plywood case or be required                                                            Our Services