GB Stainless Steel Pneumatic Gate Valve

• Media: Water
• Temperature: Ordinary Temperature
• Type: Straight-through
• Material: Stainless Steel
• Connection Form: Flange
• Pressure: Ordinary Temperature
• Model NO.: z641
• Actuator: Pneumatic
• Seal Surface: Wedge Gate Valve
• Thread Position of Valve Rod: Inside Gate Valve
• Usage: Regulation, Safety, Temperature Control
• Application: Industrial Usage
• Transport Package: Wooden Case
• Specification: DN50-DN1500
• Trademark: BVMC
• Origin: China
• HS Code: 8481804090
• Production Capacity: 10000pieces/Year

Product Description

This series of products use purified compressed air of 0.4 ~ 0.6 MPa (gauge pressure) as working pressure to push the piston and drive the gate to move perpendicular to the fluid, thus realizing the purpose of opening and closing the valve. Cleverly designed double-layer cylinder and buffer mechanism The working principle of double-deck cylinder and buffer mechanism is described as follows according to the four stages of ram work: (Attached schematic diagrams
 1. Before the gate valve is opened: the piston of the upper cylinder (hereinafter referred to as the upper piston) and the piston of the lower cylinder (hereinafter referred to as the lower piston) are stressed at the same time. Driven by the upper and lower pistons, the valve stem overcomes the maximum static friction between the sealing surface of the gate and the sealing surface of the valve body with nearly twice the lifting force of the single piston, and drives the gate to rise. Compressed air flows from the lower air chamber of the upper cylinder to the lower air chamber of the lower cylinder through a communication pipe through a specific channel arranged on the partition plate, so as to push the upper and lower pistons to work at the same time. The gas in the upper air chamber of the lower cylinder passes through another specific channel arranged in the partition. It is discharged out of the cylinder body unimpeded.
2. Later stage of gate valve opening: After the gate valve is slightly opened, the lower piston moves to the top dead center, and the gate valve is driven by the upper piston to continue to lift until it reaches the full open position.
3. Pre-closing stage of gate valve: Driven by the upper piston, the gate leaves the fully open position and begins to descend.
4. Later stage of shutter closing: When the upper piston hits the lower piston boss and drives the lower piston to continue descending together, the descending speed is obviously slowed down due to the obstruction of the air inlet passage of the upper air chamber of the lower cylinder and the exhaust passage of the lower air chamber of the lower cylinder, until the shutter descends to the fully closed position.

size inch	2	2.1/2	3	4	6	8	10	12	14	16	18	24	26	28	30	32	36	42
mm	50	65	80	100	150	200	250	300	350	400	450	600	650	700	750	800	900	1050
A	51	63.5	76	102	152	200	248	299	327	375	419	559	603	648	737	781	876	978
C Travel	62	78	96	127	170	220	270	330	350	420	470	600	650	685	780	805	930	1020
H Closed	465	480	590	686	815	1052	1087	1248	1595	1720	1975	2375	2466	2580	3070	3150	3275	3850
H1	-	-	-	-	-	1430	1470	1790	2115	2380	2660	3270	3360	3570	4230	4320	4590	5250
LBW /RF	292	330	356	432	559	600	787	838	889	991	1092	1397	1448	1549	1651	1778	2083	2438
LRTJ	295	333	359	435	562	664	791	841	892	994	1095	1407	1460	1562	1664	1794	2099	2454
V	300	300	400	400	600	-	-	-	-	-	-	-	-	-	-	-	-	-
V1	-	-	-	-	-	600	800	600	600	600	600	800	800	800	800	800	800	800
Weight RF kg	44	51	81	136	294	509	760	1035	1440	1787	2430	4620	5120	7420	7914	9150	10400	24100
Weight BW kg	36	43	72	115	255	438	635	920	1310	1510	2160	3920	4295	4980	6710	7834	8220	20230

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