Product Details

Direct factory GD series stainless steel high vacuum flapper type check valve

I.GD high vacuum flapper valve is used to put through or cut off the airflow in vacuum pipeline. Applicable medium can be pure air and noncorrosive gases. According to its shaft seal structure, high vacuum flapper valve is classified in to GD-J rubber shaft seal type and GD-J (b) bellows shaft seal type. According to its put-through type, it is classified into GD-J angle type and GD-S three-way type with prepumping.

II.Materials of Main Parts

Body, bonnet and stem: aluminium alloy, carbon steel or stainless steel,
Sealing element: NBR, Viton, bellows (shaft seal).

III.Main Technical Performance

Applicability	105~1.310-4Pa( Rubber seal ) 105~1.310-5Pa( Bellows seal )
Valve Leak Rate	≤1.310-4Pa.L/S( Rubber seal ) ≤1.310-5Pa.L/S( Bellows seal )
Applicable Temperature	-25~+80°C( Nitrile rubber ) -30~+150°C( Viton )

IV.Overall and Connection Dimensions (mm)

Model	DN	D1	D	A	H	P	flange standard
GD-J10(b)	10	12.2	30	40	124.5	60	GB4982
GD-J16(b)	16	17.2	30	40	124.5	60
GD-J25(b)	25	26.2	40	50	134.5	78
GD-J32(b)	32	34.2	55	58	153	78
GD-J40(b)	40	41.2	55	65	160.5	78
GD-J50(b)	50	52.2	75	70	203	78

Model	DN	D1	Do	D2	A	P	H	n-Φc	Dny	flange standard
GD-J50	50	110	90	55	70	78	203	4-Φ9		GB6070
GD-J63	63	130	110	68	88	160	280	4-Φ9
GD-J80	80	145	125	85	98	160	400	8-Φ9
GD-J100	100	165	145	105	108	160	420	8-Φ9
GD-J160	160	225	200	165	158	160	575	8-Φ11	DN 40 GB4982
GD-J200	200	285	260	208	200	160	655	12-Φ11	DN 50 GB6070
GD-J250	250	335	310	258	208	250	690	12-Φ11	DN 63 GB6070
GD-J320	320	425	395	328	250	250	785	12-Φ14	DN 80 GB6070
GD-J150	150	220	195	156	158	160	575	8-Φ12	DN 40 GB4982	JB919
GD-J300	300	380	350	308	250	250	785	8-Φ14	DN 80 GB6070	JB919