Product Details

Direct factory GDQ Pneumatic High Vacuum Flapper Valve

I.GDQ pneumatic high vacuum flapper valve uses solenoid directional valve to change the direction of air passage, and controls the actuating cylinder to drive the valve openedand closed. It is used to put through or cut off the airflow in vacuum pipeline. Applicable medium can be pure air and noncorrosive gases.

With signal feedback device.

II.Body, bonnet and stem: aluminium alloy, carbon steel or stainless steel,

Sealing element: NBR, Viton, bellows (shaft seal).

III.Main Technical Performance

Applicability	105~1.3×10-4Pa( Rubber seal ) 105~1.3×10-5Pa( Bellows seal )
Valve Leak Rate	≤1.3×10-4Pa.L/S(Rubber seal) ≤1.3×10-5Pa.L/S( Bellows seal )
Applicable Temperature	-25~+80°C( Nitrile rubber ) -30~+150°C( Viton )
Annoy pressure	0.4~0.6MPa

IV.Overall and Connection Dimensions (mm)

a. Quick release flange connection

Model	DN	D1	D	A	H	B	W	flange standard
GDQ-J10(b)	10	12.2	30	30	120	52	40	GB4982
GDQ-J16(b)	16	17.2	30	40	140	58	40
GDQ-J25(b)	25	26.2	40	50	150	58	40
GDQ-J32(b)	32	34.2	55	58	158	58	40
GDQ-J40(b)	40	41.2	55	65	183	75	50
GDQ-J50(b)	50	52.2	75	70	190	75	50

b. Looper flange connection

Model	DN	D	Do	D2	A	P	H	n-Φc	Dny Pre-pumping mouth	flange standard
GDQ-J50	50	110	90	55	70	95	278	4-φ9		GB6070
GDQ-J63	63	130	110	68	88	108	360	4-φ9
GDQ-J80	80	145	125	85	98	133	379	8-φ9
GDQ-J100	100	165	145	105	108	159	394	8-φ9
GDQ-J(S)160	160	225	200	165	158	240	555	8-φ11	DN40 GB4982
GDQ-J(S)200	200	285	260	208	200	280	623	12-φ11	DN50 GB6070
GDQ-J(S)250	250	335	310	258	208	350	663	12-φ11	DN63 GB6070
GDQ-J(S)320	320	425	395	328	250	425	832	12-φ14	DN80 GB6070
GDQ-J(S)400	400	510	480	410	330	530	1120	16-φ14	DN100 GB6070
GDQ-J(S)500	500	610	580	510	360	630	1036	16-φ14	DN125 GB6070
GDQ-J(S)630	630	750	720	642	450	750	1415	20-φ14	DN160 GB6070
GDQ-J(S)800	800	920	880	815	530	920	1850	24-φ14	DN200 GB6070
GDQ-J(S)150	150	220	195	156	158	160	555	8-φ12	DN40 GB4982	JB919
GDQ-J(S)300	300	380	350	308	250	250	832	8-φ14	DN80 GB6070
GDQ-J(S)600	600	710	670	610	450	750	1415	12-φ21	DN150 GB919