Pneumatic hard seal butterfly valve utilized a U shape seal ring which is made of stainless steel. The elastic seal ring connect with eccentric disc which has been polished. The disc separates form sealing face when valve opened and connect with sealing face when valve closed to realize sealing, having the advantages of long service life and good sealing. Applicable temperature belows 550℃. Pneumatic hard seal butterfly valve is widely used for pipelines to regulate flow or closure fluid in metallurgy, petroleum, gas and other industries.

 

Characteristics   

1. The butterfly valve has simple structure, light weight and convenient utilization.

2. The valve utilizes U shape stainless steel seal ring, having elasticity. The seal ring, cooperating with disc, ensure the excellent seal with the disc, under low temperature or high temperature. 

3. Three dimensional eccentricity of valve is calculated strictly. U shape seal ring has advantages of long service life and excellent seal.

4. Seal facing overlay with STL, has the advantages of wear resistance and long service life.

5. The valve has unique structure and is convenient to use.

6. Heat resistance, low temperature resistance and corrosion resistance.

 

Standards 

Manufacturing: GB/T12238-1989

Flange Dimensions:

GB/T9113.1-2000: GB/T9113.2-2000

GB/T9115.1-2000: GB/T9115.2-2000

Face to Face Dimension: GB/T12221-1989

Test Standards: GB/T13927-1992；JB/T9092-1999

 

Actuator 

Pneumatic wafer butterfly valve utilizes GT pneumatic actuator, having double-acting and single-acting (spring reset). It is drove by gear, safe and reliable. Large diameter valve utilizes AW pneumatic actuator. It has reasonable structure, large torque output, double-acting and single-acting.

1. Gear dual piston, large torque output, small volume

2. Cylinder, made of aluminum gold, has light weight and beautiful form.

3. Manual handle can be installed on the top or at the bottom.

4. Gear connection can regulate opening angle and rated flow.

5. Actuator can ba attached with electric signal indication or other attachment to realize automation.

6. ISO05211 ensures installment of product

 

Options for accessories

Accessories based on different control or requirements

Cut off accessories: single solenoid valve, double solenoid valve, limit switch echo

Regulated accessories: electric positioner, pneumatic positioner, electric converter

Air supply treatment accessories: air filtrating pressure reducing valve, air supply FRL

Manual handle: HVSD manual handle

 

Connection Dimensions (unit: mm)

Nominal diameter(DN)	Dimensions			Flange sizes & bolt specifications
				1.0MPa		1.6MPa		2.5MPa
	L	H	H1	D1	4-Ф－M	D1	4-Ф－M	D1	4-Ф－M
50	43	350	112	125	Ф18	125	Ф18	125	Ф18
65	46	370	115	145	Ф18	145	Ф18	145	Ф18
80	49	380	120	160	Ф18	160	Ф18	160	Ф18
100	56	420	138	180	Ф18	180	Ф18	190	Ф23
125	64	460	164	210	Ф18	210	Ф18	220	Ф27
150	70	555	175	240	Ф23	240	Ф23	250	Ф27
200	71	605	208	295	M20	295	M20	310	M24
250	76	680	243	350	M20	355	M24	370	M27
300	83	800	283	400	M20	410	M24	430	M27
350	92	835	310	460	M20	470	M24	490	M30
400	102	915	340	515	M24	525	M27	550	M33
450	114	960	380	565	M24	585	M27	600	M33
500	127	1020	410	620	M24	650	M30	660	M33
600	154	1225	470	725	M27	770	M33	770	M36
700	165	1355	550	840	M27	840	M33	875	M39
800	190	1470	640	950	M30	950	M36	990	M45
900	203	1545	710	1050	M30	1050	M36	1090	M45
1000	216	1795	770	1160	M33	1170	M39	1210	M52
1200	254	1965	890	1380	M36	1390	M45	1420	M52