Pneumatic clamp butterfly valve (soft seal)_Meisonilan Valves (Suzhou) Co., Ltd.

(1) Novel and reasonable design, unique structure, lightweight, and quick opening and closing.
(2) Small operating torque, easy to operate, labor-saving and agile.
(3) Can be installed in any position, easy to maintain.
(4) The seals can be replaced, and the sealing performance is reliable, achieving bi-directional sealing with zero leakage.
(5) The sealing material has the characteristics of aging resistance, corrosion resistance, and long service life.

Pneumatic Soft Sealing Butterfly Valve Technical Parameters

Nominal Diameter DN (mm)	DN50 - 1000mm
Nominal Pressure (MPa)	PN1.0, 1.6, 2.5MPa
Valve Body Form	Straight-through Cast Valve Body
Connection Form	Flange Type, Wafer Type
Valve Core Form	Butterfly Plate Type
Sealing Packing	Flexible Graphite, Polytetrafluoroethylene
Basic Error	With Positioner: Less than ±2% of the Full Stroke
Hysteresis	With Positioner: Less than ±2% of the Full Stroke
Control Mode	On-off Type (Two-position On-off Control), Regulating Type (4 - 20mA Control)

Pneumatic Soft Sealing Butterfly Valve Actuator Parameters

Actuator Model	GT, AT, AR, AW Series Single and Double Acting Pneumatic Actuators
Supply Pressure	0.4 - 0.7MPa
Air Source Interface	G1/4", G1/8", G3/8", G1/2"
Ambient Temperature	-30 - +70°C
Action Form	Single Acting Actuator: Air-to-close (B) - Valve Opens when Air is Lost (FO); Air-to-open (K) - Valve Closes when Air is Lost (FC) Double Acting Actuator: Air-to-close (B) - Valve Position Remains when Air is Lost (FL); Air-to-open (K) - Valve Position Remains when Air is Lost (FL)
Available Accessories	Positioner, Solenoid Valve, Air Filter Regulator, Position Maintaining Valve, Travel Switch, Valve Position Transmitter, Handwheel Mechanism, etc.

The new series of pneumatic actuators are adopted, including double acting type and single acting type (spring return), with gear and rack transmission, which is safe and reliable; Large-diameter valves adopt the series AW pneumatic actuators with fork type transmission, with reasonable structure, large output torque, and both double acting type and single acting type.
1. Gear type double piston, with large output torque and small volume.
2. The cylinder is made of aluminum alloy material, with light weight and beautiful appearance.
3. Manual operation mechanisms can be installed at the top and bottom.
4. The rack type connection can adjust the opening angle and rated flow.
5. The actuator can be optionally equipped with electrical signal feedback indication and various accessories to realize automatic operation.
6. The ISO5211 standard connection provides convenience for the installation and replacement of products.
7. The adjusting screws at both ends can make the standard product have an adjustable range of ±4° at 0° and 90°. Ensure the synchronization accuracy with the valve.

Pneumatic Soft Sealing Butterfly Valve Part Materials

Part Name	Main Material
Valve Body	Ductile Cast Steel, Cast Steel, Alloy Steel, Stainless Steel
Butterfly Plate	Gray Cast Iron, Ductile Cast Steel, Cast Steel, Stainless Steel and Special Materials
Sealing Ring	Various Rubbers, Polytetrafluoroethylene
Valve Stem	2Cr13, Stainless Steel
Packing	O-ring, Flexible Graphite O

Pneumatic Soft Sealing Butterfly Valve Performance Specification

Nominal Diameter	DN (mm)	50 - 1000
Nominal Pressure	PN (MPa)	0.6	1.0	1.6
Test Pressure	Strength Test	0.9	1.5	2.4
	Sealing Test	0.66	1.1	1.76
	Gas Sealing Test	0.6	0.6	0.6
Applicable Medium	Air, Water, Sewage, Steam, Gas, Oil, etc.
Driving Form	Pneumatic Transmission

Pneumatic Soft Sealing Butterfly Valve Design Standards

Design Standard	GB/T12238 - 1989
Flange Connection Dimensions	GB/T9113.1 - 2000; GB/T9115.1 - 2000; JB78
Structure Length	GB/T12221 - 1989
Pressure Test	GB/T13927 - 2000; JB/T9092 - 1999

Pneumatic Soft Sealing Butterfly Valve Sealing Materials and Applicable Temperatures

Material Variety	Neoprene	Nitrile Rubber	EPDM Rubber	Polytetrafluoroethylene	Silicone Rubber	Fluororubber	Natural Rubber	Nylon
English Abbreviation	CR	NBR	EPDM	PTFE	SI	VITON	NR	PA
Model Code	X or J	XA or JA	XB or JB	F or XC, JC	XD or JD	XE or JE	X1	N
Maximum Temperature Resistance	82°C	93°C	150°C	232°C	250°C	204°C	85°C	93°C
Minimum Temperature Resistance	-40°C	-40°C	-40°C	-268°C	-70°C	-23°C	-20°C	-73°C
Applicable Operating Temperature	0 - +80°C	-20 - +82°C	-40 - +125°C	-30 - +150°C	-70 - +150°C	-23 - +150°C	-20 - +85°C	-30 - +93°C

Pneumatic Soft Sealing Butterfly Valve Connection Dimension Diagram

D641X Pneumatic Soft Sealing Butterfly Valve (Flange Type)	D671X Pneumatic Soft Sealing Butterfly Valve (Wafer Type)

Pneumatic Soft Sealing Butterfly Valve Connection Dimensions

Nominal Diameter		Structure Length		Overall Dimensions (Reference Value)			Connection Dimensions (Standard Value)
Nominal Diameter		Structure Length		Overall Dimensions (Reference Value)			0.6MPa			1.0MPa			1.6MPa
Millimeter	Inch	L	L1	H	H1	A	D	D1	n-d	D	D1	n-d	D	D1	n-d
50	2	108	43	63	315	180	140	110	4-14	165	125	4-18	165	125	4-18
65	2 1/2	112	46	70	330	180	160	130	4-14	185	145	4-18	185	145	4-18
80	3	114	46	83	390	245	190	150	4-18	200	160	8-18	200	160	8-18
100	4	127	52	105	431	240	210	170	4-18	220	180	8-18	220	180	8-18
125	5	140	56	115	455	240	240	200	8-18	250	210	8-18	250	210	8-18
150	6	140	56	137	626	350	265	225	8-18	285	240	8-22	285	240	8-22
200	8	152	60	164	720	350	320	280	8-18	340	295	8-22	340	295	12-22
250	10	165	68	206	800	550	375	335	12-18	395	350	12-22	405	355	12-26
300	12	178	78	230	860	600	440	395	12-22	445	400	12-22	460	410	12-26
350	14	190	78	248	883	600	490	445	12-22	505	460	16-22	520	470	16-26
400	16	216	102	289	972	600	540	495	16-22	565	515	16-26	580	525	16-30
450	18	222	114	320	1043	750	595	550	16-22	615	565	20-26	640	585	20-30
500	20	229	127	343	1098	750	645	600	20-22	670	620	20-26	715	650	20-33
600	24	267	154	413	1236	750	755	705	20-26	780	725	20-30	840	770	20-36
700	28	430	165	478	1431	750	860	810	24-26	895	840	24-30	910	840	24-36
800	32	470	190	525	1488	750	975	920	24-30	1015	950	24-33	1025	950	24-39
900	36	510	203	620	1615	1250	1075	1020	24-30	1115	1050	28-33	1125	1050	28-39
1000	40	550	216	725	1765	1500	1175	1120	28-30	1230	1160	28-36	1255	1170	28-42
1200	48	630	254	780	1976	1500	1405	1340	32-33	1455	1380	32-39	1485	1390	32-48

Pneumatic Soft Sealing Butterfly Valve Product Selection

(1) Valve body parameters: A series of parameters such as nominal diameter, working pressure, process medium, usage occasion, valve body material, etc.

(2) Actuator parameters: Actuator form, control mode, control signal (4 - 20mA, 1 - 5V), action mode (air-to-open, air-to-close)

Please provide the above technical parameters in as much detail as possible to facilitate our company's production and technical personnel to accurately select the model for you. If you have any questions, you can call us, and we will surely do our best to provide you with high-quality services!

Valve Installation:
(1) Before installation, check that the product model, tag number, and specifications match the requirements. Inspect the entire valve for missing or loose parts.
(2) Prior to installation, clean the pipeline. Ensure there is sufficient straight pipe section at the valve inlet and install a filter. When connecting the valve body to the pipeline flanges, ensure coaxiality.
(3) Thoroughly clean the pipeline before installing the valve.
(4) The installation site should ensure the safety of personnel and equipment, facilitating operation, disassembly, and maintenance.
(5) The valve should be installed vertically upright on horizontal pipelines. If necessary, it can be installed at an angle, but horizontal installation should be avoided. For occasions with heavy valve weight or vibration, use a support frame.
(6) The medium flow direction must align with the arrow on the valve body. The air supply should be dry and oil-free. The valve should be used in environments with temperatures ranging from -20℃ to 55℃.

Valve Maintenance:
(1) Cleaning the Valve: For general media, cleaning with water is sufficient. For media harmful to health, first understand their properties and then select an appropriate cleaning method.
(2) Disassembly: Remove rust from exposed rusted parts first. Before derusting, protect the machined surfaces of precision parts such as the valve seat, valve plug, valve stem, and push rod. Use special tools when disassembling the valve seat.
(3) Valve Seat: Minor rust or wear on the sealing surface can be repaired by machining. If damage is severe, replace the seat. However, both repaired and replaced hard sealing surfaces must be lapped.
(4) Valve Stem: If the surface is damaged, it must be replaced.
(5) Damage to Push Rod, Guide, and Sealing Surfaces: Reverse-acting actuators must be replaced; direct-acting actuators can be reused after proper repair.
(6) Compression Spring: If there are cracks or other defects affecting strength, replace it immediately.
(7) Wear Parts: Packing, gaskets, and O-rings must be replaced entirely during each maintenance. Check the valve plug and diaphragm for cracks, aging, or corrosion that may cause future failures. Decide whether to replace them based on inspection results, but the diaphragm service life should not exceed 2-3 years.
(8) When reassembling the valve, ensure alignment. Tighten bolts diagonally and lubricate sliding parts. After reassembly, debug the valve according to the factory test items and methods. During this period, accurately adjust the packing compression force and the valve plug closing position.

When placing an order, please fill in the Specification Sheet or specify the following information:

If the model has not been selected before ordering, please provide us with the operating parameters:
(1) Nominal diameter DN (mm);
(2) Nominal pressure (MPa or bar);
(3) Fluid properties (including medium temperature, viscosity, or acidity/alkalinity);
(4) Pressure before and after the valve (pressure differential);
(5) Requirements for flow characteristics;
(6) Materials of valve body and valve core;
(7) Connection type;
(8) Driving method (provide air supply pressure, driving voltage);
(9) Supporting accessories (for pneumatic valves, it is recommended that users install an air filter triplet and a 2-position 5-way solenoid valve);
(10) On-site working conditions.
If the product model of our company has been selected by the design unit, please order directly from our production department according to the model;
When the application occasion is very important or the pipeline is relatively complex, please provide the design drawings and detailed parameters as much as possible, and our experts will review and check them for you.