What types of valves does KR Valve manufacture?

KR Valve manufactures more than 500 valve products, including wafer, lug, concentric and double eccentric butterfly valves, resilient seat, metal seat and knife gate valves, dual disc, swing, lift and ball type check valves, ball valves, hydraulic water control valves such as 200X pressure reducing valves and 100X remote float valves, and Y type strainers.

Which international standards do KR valves follow?

Our range covers common international standards such as DIN F5 face-to-face gate valves, BS5163 resilient seat gate valves, BS5153 dual disc check valves, ANSI flanged strainers and PN16 pressure rated water control valves. Non-standard designs can be engineered to your drawings.

Do you offer OEM valve manufacturing?

Yes. In addition to our own KR brand, we provide OEM services, including customer branding, specified body and seat materials, actuation options and project-specific packaging.

Should I choose a wafer or a lug butterfly valve?

Wafer butterfly valves are lighter and more economical and are clamped between two flanges, making them ideal for standard water and HVAC lines. Lug butterfly valves have threaded lugs that allow dead-end service and removal of downstream piping without draining the whole line, which suits maintenance-critical systems.

How is valve quality controlled before shipment?

Every process is inspected from raw material to finished product, and 100% of finished valves are inspected before dispatch. Production plans and lead times are defined upfront through full-chain supply control.

Custom DN700 WCB Cast Steel Flanged Gate Valve Manufacturer Industrial Carbon Steel Flange Gate Valves Supplier Wholesale Factory Direct

Quick Specifications

Valve Type

Metal seat gate valve

Structure

Rising type

Standard

EN / API / DIN / GOST

Workmanship

Investment casting

Sealing Direction

Bidirectional

Sealing Grade

Zero leakage

Temperature

-30°C < T < 425°C

Operation

Handwheel

Characteristics

The valve body adopts integral casting or forging technology, and the wall thickness is strengthened according to the pressure level, which can withstand pipeline water hammer impact and industrial site vibration. The valve stem and gate are rigidly connected (T-shaped groove+bolt/pin shaft) to prevent damage to the sealing surface caused by gate shaking.

Advantages

1. Convenient maintenance

The valve body and valve cover are connected by flanges, and there is no need to disassemble the entire valve during maintenance. Only the valve cover needs to be removed to replace internal components such as gate plates, seals, and packing; The packing box supports online replacement of packing, which does not affect the normal operation of the pipeline and significantly reduces maintenance costs.

2. High temperature resistance

Carbon steel material (WCB) gate valve: Metal sealed structure, temperature resistance range -29 ℃~540 ℃, suitable for media such as water, oil, steam, etc;
Alloy steel material (WC6/WC9) gate valve: Temperature resistance up to 650 ℃, suitable for high temperature reheating steam pipelines in power plants;
Soft sealing structure (PTFE/EPDM): Temperature resistance range -20 ℃~180 ℃, suitable for low temperature and low pressure scenarios such as municipal water supply and drainage.

Packing

Standard export wooden case packaging

Application Scenarios

The large size gate valve widely used in large-diameter pipeline systems in industries such as oil and gas, electricity, municipal water supply and drainage, chemical engineering, metallurgy, and people's livelihoods.

Material Specifications

Valve body / Valve cover	Gate board / Seat	Stem	Stem nut	Padding	Handwheel
Carbon steel	Quality carbon steel + carbide alloy or stainless steel	Chrome stainless steel	Aluminum bronze	Graphite asbestos packing	Malleable iron / Ductile Iron
Ti-Cr-Ni steel	Stainless steel or carbide alloy	Ti-Cr-Ni stainless steel	Aluminum bronze	Baptist PTFE	Malleable iron / Ductile Iron
Ti-Cr-Ni-Mo steel	Stainless steel or carbide alloy	Ti-Cr-Ni stainless steel	Aluminum bronze	Asbestos packing	Malleable iron / Ductile Iron
Cr-Mo steel	Alloy Steel + carbide alloy	Al-Cr-Mo steel 318 (anti-S series)	Aluminum bronze	Flexible Graphite Filled PTFE (anti-S series)	Malleable iron / Ductile Iron

Dimensions

PN (MPa)	DN (mm)	L	D	D1	D2	D6	b	f	f2	N-φd	H	H1	D0
1.6	15	130	95	65	45	-	14	2	-	4-φ14	220	240	120
	20	150	105	75	55	-	14	2	-	4-φ14	255	284	140
	25	160	115	85	65	-	14	2	-	4-φ14	275	303	160
	32	180	135	100	78	-	16	2	-	4-φ18	280	321	180
	40	200	145	110	85	-	16	3	-	4-φ18	300	352	200
	50	250	160	125	100	-	16	3	-	4-φ18	358	438	240
	65	265	180	145	120	-	18	3	-	4-φ18	375	450	240
	80	280	195	160	135	-	20	3	-	8-φ18	433	528	280
	100	300	215	180	155	-	20	3	-	8-φ18	502	620	320
	125	325	245	210	185	-	22	3	-	8-φ18	612	753	360
	150	350	280	240	210	-	24	3	-	8-φ23	676	847	360
	200	400	335	295	265	-	26	3	-	12-φ23	820	1039	400
	250	450	405	355	320	-	40	3	-	12-φ25	969	1245	450
	300	500	460	410	375	-	40	3	-	12-φ25	1142	1472	560
	350	550	520	470	435	-	34	4	-	16-φ25	1280	1450	640
	400	600	580	525	485	-	36	4	-	16-φ30	1452	1887	640
	450	650	640	585	545	-	40	4	-	20-φ30	1541	2011	720
	500	700	705	650	608	-	44	4	-	20-φ30	1676	2181	720
	600	800	840	770	718	-	48	5	-	20-φ41	1874	2346	800
2.5	15	130	95	65	45	-	16	2	-	4-φ14	220	240	120
	20	150	105	75	55	-	16	2	-	4-φ14	255	284	140
	25	160	115	85	65	-	16	2	-	4-φ14	275	303	160
	32	180	135	100	78	-	18	2	-	4-φ18	280	321	180
	40	200	145	110	85	-	18	3	-	4-φ18	300	352	200
	50	250	160	125	100	-	20	3	-	4-φ18	358	438	240
	65	265	180	145	120	-	22	3	-	8-φ18	375	450	240
	80	280	195	160	135	-	22	3	-	8-φ18	433	528	280
	100	300	230	190	160	-	24	3	-	8-φ23	502	620	320
	125	325	270	220	188	-	28	3	-	8-φ25	612	753	360
	150	350	300	250	218	-	30	3	-	8-φ25	676	847	360
	200	400	360	310	278	-	34	3	-	12-φ25	820	1039	400
	250	450	425	370	332	-	36	3	-	12-φ30	969	1245	450
	300	600	485	430	390	-	40	4	-	16-φ30	1142	1472	560
	350	550	550	490	448	-	44	4	-	16-φ34	1280	1450	640
	400	600	610	550	505	-	48	4	-	16-φ34	1452	1887	640
	450	650	660	600	555	-	50	4	-	20-φ34	1541	2011	720
	500	700	730	660	610	-	52	4	-	20-φ41	1676	2181	720
	600	800	840	770	718	-	56	5	-	20-φ41	1874	2346	800
4.0	20	150	105	75	55	51	16	2	4	4-φ14	256	285	140
	25	160	115	85	65	58	16	2	4	4-φ14	275	305	160
	32	180	135	100	78	66	18	2	4	4-φ18	287	322	180
	40	200	145	110	85	76	18	3	4	4-φ18	323	369	200
	50	250	160	125	100	88	20	3	4	4-φ18	372	440	280
	65	280	180	145	120	110	22	3	4	8-φ18	395	473	280
	80	310	195	160	135	121	22	3	4	8-φ18	457	552	320
	100	350	230	190	160	150	24	3	4.5	8-φ23	552	671	360
	125	400	270	220	188	176	28	3	4.5	8-φ25	634	726	400
	150	450	300	250	218	204	30	3	4.5	8-φ25	708	883	400
	200	550	375	320	282	260	38	3	4.5	8-φ30	858	1086	450
	250	650	445	385	345	313	42	3	4.5	12-φ34	1015	1298	560
	300	750	510	450	408	364	46	4	4.5	12-φ34	1203	1535	640
	350	850	570	510	465	422	52	4	5	16-φ34	1341	1678	640
	400	950	655	585	535	474	58	4	5	16-φ41	1492	1903	720

Frequently Asked Questions (FAQ)

Q: What international standards do these gate valves conform to?

Our metal seat gate valves comply with major international manufacturing standards including EN, API, DIN, and GOST specifications.

Q: What is the operating temperature range for these valves?

The standard operating temperature ranges from -30°C to 425°C. For special alloy steel materials like WC6 or WC9, the temperature resistance can reach up to 650°C.

Q: Can the valve packing be replaced while the system is online?

Yes, the packing box design allows online packing replacement without shutting down or interrupting normal pipeline operations, significantly minimizing maintenance downtime and costs.

Q: What level of sealing performance can be expected?

The valve features a bidirectional sealing structure with a zero-leakage sealing grade. The stem and gate are rigidly connected via T-slot and pin configuration to prevent sealing surface wear caused by gate shaking.

Q: How are these valves packaged for international delivery?

All products are packed in standard export wooden cases to protect internal components against moisture, corrosion, and physical impact during long-distance transit.

Q: What are the primary industries served by these large size gate valves?

They are widely applied in large-diameter piping systems across oil and gas, power generation, chemical engineering, municipal water supply and drainage, and metallurgical applications.