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Petroleum and petrochemical industry

Flat gate valve

Product Overview

Flat gate valve is suitable for natural gas, petroleum, chemical, environmental protection, city pipeline, gas pipeline and other transmission pipeline, vent system and steam storage device, used as opening and closing equipment. It is suitable for long-distance pipeline of natural gas exploitation and purification.

Structural characteristics

The sealing structure of the valve seat shall be elastic with pre tightening force, and the upstream and downstream sealing seats shall be sealed at the same time. The valve seat and the seal are always face-to-face; the valve seat has self-cleaning function and is not directly scoured by the air flow during the opening or closing process of the valve. The valve seat shall be made of lubricated, non wearing materials; the failure of valve actuator will not affect other parts of the valve, and the maintenance and replacement work can be carried out without removing the valve.
(1) Yoke sleeve – aluminum bronze yoke sleeve with needle thrust bearing to minimize operating torque.
(2) Stem – thread length up to bracket; pin and spot weld; stable.
(3) Pressure seal - simple construction with segmented retaining ring and silver plated mild steel gasket to facilitate disassembly and optimum bonnet seal
(4) Seat ring – welded seat rings are perpendicular to the flow path for easy maintenance.
(5) Actuators – these valves can be equipped with electric, hydraulic or pneumatic actuators. Standard manual hand wheel is equipped below DN300, and helical gear operating mechanism is equipped above DN350.
(6) Yoke – the fully assembled yoke is seismic tested and easy to maintain and install the actuator.
(7) Gland – two piece, self-adjusting gland to avoid being ejected.
(8) Integral rear seat – hard facing for maximum service life.
(9) Disc – spring loaded disc is self-adjusting to reduce actuator torque requirements.
(10) Integral stop - integral casting bracket stop device, positioning the assembled bracket disc, making the valve seat more stable and reliable.

Execution standard

Design specification: JB/T5298, API6D
Structure length: JB/T5298, API6D
Connection flange: JB/79, ANSI-16.5
Test and Inspection: JB/T5298, API6D
Pressure-temperature: GB9131, ANSI B16.34

Performance parameter

Nominal diameter: DN50~1000mm
Nominal pressure: PN1.6~ 6.4mpa
Applicable temperature: -12~121℃
Applicable medium: petroleum, natural gas, water, etc
Main material: cast steel, stainless steel

Product Dimensions

RF (K)Z43WF-25 (K)Z543WF-25 (K)Z643WF-25 (K)Z943WF-25	65	190	180	145	120	300	3	22	634	95	8-Φ18
	80	203	195	160	135	350	3	22,	388	100	8-Φ18
	100	229	230	190	160	350	3	24	863	114	8-Φ23
	125	254	270	220	188,	350	3	28	940	132	8-Φ25
	150	267	300	250	218	400	3	30	1030	150	8-Φ25
	200	292	360	310	278	450	3	34	1277	168	12-Φ25
	250	330	425	370	332	500	3	36	1491	203	12-Φ30
	300	356	485	430	390	305	4	40	1701	237	16-Φ30
	350	381	550	490	448	305	4	44	1875	265	16-Φ34
	400	406	610	550	505	305	4	48	2180	300	16-Φ34
	450	432	660	600	555	305	4	50	2440	325	20-Φ34
	500	457	730	660	610	305	4	52	2860	360	20-Φ41
	600	508	840	770	718	305	5	56	3450	425	20-Φ41
	700	610	955	875	815	305	5	60	3960	460	24-Φ48
	800	660	1070	990	930	305	5	64	4550	512	24-Φ48
	900	711	1180	1090	1025	-	5	66	5250	595	28-Φ54
	1000	811	1305	1210	1140	-	5	68	5870	660	28-Φ48

Flat gate valve without diversion hole PN4.0MPa-10.0MPa：

MFM (K)Z43WF-40 (K)Z543WF-40 (K)Z643WF-40 (K)Z943WF-40	50	250	160	125	100	88	250	3	4	20	584	80	4-Φ18
	65	280	180	145	120	110	250	3	4	22	634	95	8-Φ18
	80	310	195	160	135	121	250	3	4	22	679	102	8-Φ18
	100	350	230	190	160	150	300	3	4.5	24	863	115	8-Φ23
	125	400	270	220	188	176	350	3	4.5	28	940	133	8-Φ25
	150	450	300	250	218	204	350	3	4.5	30	1040	152	8-Φ25
	200	550	375	320	282	260	350	3	4.5	38	1282	188	12-Φ30
	250	650	445	385	345	313	400	3	4.5	42	1495	223	12-Φ34
	300	750	415	450	408	364	450	4	4.5	46	1701	250	16-Φ34
	350	850	470	510	465	422	500	4	5	52	1880	280	16-Φ34
	400	950	655	585	535	474	305	4	5	58	2200	310	20-Φ41
	450	1050	680	610	560	524	305	4	5	60	2480	335	20-Φ41
	500	1150	755	670	612	576	305	4	5	62	2890	380	20-Φ48
	600	1350	890	795	730	678	305	5	6	62	2480	450	20-Φ54
	700	1450	995	900	835	768	305	5	6	68	3985	500	24-Φ54
	800	1650	1135	1030	960	876	305	5	6	76	4750	570	24-Φ58
6.4MPa	50	250	175	135	105	88	250	3	4	26	584	90	4-Φ23
MFM (K)Z43WF-64 (K)Z543WF-64 (K)Z643WF-64 (K)Z943WF-64	65	280	200	160	130	110	250	3	4	28	634	105	8-Φ23
	80	310	210	170	140	121	250	3	4	30	679	110	8-Φ23
	100	350	250	200	168	150	300	3	4.5	32	763	130	8-Φ25
	125	400	295	202	176	350	3	4.5	36	970	150	8-Φ30	-
	150	450	340	280	240	204	350	3	4.5	38	1038	175	8-Φ34
	200	500	405	345	300	260	350	3	4.5	44	1282	210	12-Φ34
	250	650	470	400	352	313	400	3	4.5	48	1495	240	12-Φ41
	300	750	530	460	412	364	450	4	4.5	54	1965	270	16-Φ41
	350	850	595	525	475	422	500	4	5	60	2185	300	16-Φ41
	400	950	670	585	525	474	305	4	5	66	2573	335	16-Φ48
	450	1050	715	630	570	524	305	4	5	68	2800	360	20-Φ48
	500	1150	800	705	640	576	305	4	5	70	3280	405	20-Φ54
	600	1350	930	820	750	678	305	5	6	76	380	470	20-Φ58
10.0MPa	50	250	195	145	112	88	250	3	4	28	590	100	4-Φ25
MFM (K)Z43WF-100 (K)Z543WF-100 (K)Z643WF-100 (K)Z943WF-100	65	280	220	170	138	110	250	3	4	32	640	115	8-Φ25
	80	310	230	180	148	121	250	3	4	34	680	120	8-Φ25
	100	350	265	210	172	150	300	3	4.5	38	870	135	8-Φ30
	125	400	310	250	210	176	350	3	4.5	42	980	155	8-Φ34
	150	450	350	290	250	204	350	3	4.5	46	1100	180	12-Φ34
	200	550	430	360	312	260	350	3	4.5	454	1315	220	12-Φ41
	250	650	500	430	382	313	400	3	4.5	60	1605	255	12-Φ41
	300	75	585	500	442	364	450	4	4.5	70	1925	295	16-Φ48
	350	850	665	560	408	422	500	4	5	76	2280	335	16-Φ54
	400	950	715	620	558	474	305	4	5	80	2580	360	16-Φ54

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