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 Big Size WCB Cast Steel Gate Sluice Valve PN64 DN500 Manufacturer Factory Supplier

Technical Specifications Overview

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 WCB gate valves are suitable for high-pressure scenarios and enhance pressure resistance through forging or thick walled casting (wall thickness ≥ 50mm). The flow channel design is mainly based on full diameter to ensure unobstructed fluid flow and avoid medium accumulation.

Key Advantages

1. Ultra Large Circulation Capacity, Extremely Low Pressure Loss

Adopting a full bore flow channel design, the gate is completely detached from the medium flow path when fully open, and the flow channel is straight. The flow resistance coefficient can be as low as 0.05~0.1, far superior to butterfly valves and globe valves of the same diameter. For large-diameter pipelines with a diameter of DN300 or above, it can minimize the energy loss of medium transportation, especially suitable for the transportation of high flow media such as water, oil, natural gas, etc.

2. High Material Cost-Effectiveness and Strong Adaptability

The valve body is made of carbon steel (such as WCB, WCC) material, which has high strength, good toughness, and impact resistance. It can withstand temperature ranges of -29 ℃~540 ℃ and pressure levels of PN10~PN420, meeting the working requirements of the vast majority of industrial media. Compared to stainless steel and alloy steel materials, carbon steel has lower procurement and processing costs, and has extremely high cost-effectiveness in non corrosive media scenarios.

3. Stable Structure and Excellent Pressure Bearing Capacity

The valve body of large-sized carbon steel gate valves adopts thick wall casting or forging technology, and the wall thickness of the valve body increases synchronously with the diameter and pressure level, which can effectively withstand the impact of high-pressure media and pipeline stress. The wedge-shaped gate design is matched with a metal hard sealing surface (welded with STL, CoCrW and other hard alloys), which can compensate for the wear of the sealing surface through the slight wedging action of the gate, ensuring the sealing reliability under high pressure conditions. The leakage level can reach ANSI Class IV or above.

Packing & Export Packaging

Standard export wooden case packaging ensures complete protection during sea and air transit.

Application Scenarios

The large size gv valve widely applicable to oil and gas field exploration, gathering, transportation, and processing systems in the oil and gas industry, the flow direction of fluids can be controlled.

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, 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, 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 & Performance Parameters

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)

What manufacturing standards do these WCB metal seat gate valves comply with?

These gate valves fully conform to major international engineering standards including EN, API, DIN, and GOST, ensuring seamless integration into global pipeline infrastructure.

What is the operating temperature range for carbon steel WCB gate valves?

The valves are designed to operate safely across a broad working temperature range from -30°C to 425°C, with specialized configurations withstanding temperatures up to 540°C depending on medium conditions.

How does the full bore flow design minimize energy loss?

In a full bore design, the gate detaches completely from the fluid path when open, resulting in a straight-through channel. This reduces the flow resistance coefficient to as low as 0.05~0.1, significantly reducing pressure drops and pumping energy loss.

What sealing performance grade can be achieved?

Equipped with a wedge-shaped gate and metal hard sealing surfaces (such as STL or cobalt-chromium-tungsten alloy overlays), the valve provides reliable bidirectional sealing with zero leakage up to ANSI Class IV leakage ratings or higher.

Which industries primarily utilize these gate valves?

These large-size valves are widely utilized in oil and natural gas field exploration, fluid gathering, long-distance pipeline transportation, refining processing, and large water supply systems.

How are the products packaged for ocean freight protection?

All gate valves are packed using standard export-grade wooden cases, structurally reinforced to shield products against physical impact, humidity, and atmospheric corrosion during ocean or land transport.