Through Conduit Knife Gate Valve

You are looking for a heavy-duty, bi-directional knife gate valve designed for demanding applications such as pulp discharge, silo outlets and chemical loading. Our through conduit knife gate valve features a two-piece body, no stagnant area and a gate movement similar to a “cigar cutter” to provide clean shutoff, zero product accumulation and full bore flow even in processes with high impurity content such as recycled pulp.

TOT Valve complies with international standards and is tested to EN and ISO standards to ensure safety, performance and reliability in your real-world application.

Whether you need 1 or 100 pieces, we can deliver tested and qualified performance products on time.

Description

If you are handling pulp, recycled paper or slurries with solid contaminants such as short fibers or fibers, then the through conduit knife gate valve is a solution you can trust. The valve has a no stagnation zone design to ensure bi-directional sealing and zero product accumulation even in harsh, high-impact environments.

You’ll benefit from a two-piece bolted body, longer gate and dual packing system, and a through-hole design that allows full flow when open and full shutoff when closed. Ideal for pulp outlets, silo unloading, and chemical loading and unloading systems, this valve delivers clean operation, very low maintenance, and tight shutoff under pressure – exactly what your process demands.

Core Advantages at a Glance

Feature	Your Advantage
Full Bore Flow Path	No pressure drop, no turbulence, ideal for slurry and fibers
Gate with O-ported or V-notch	Precise shut-off even in partially open conditions
Dual Resilient or Metal Seats	Tight shut-off in both directions, even under fluctuating pressure
Self-cleaning Design	Flush ports eliminate accumulation of solids in seat area
Replaceable Wear Components	Seats, gate, and packing can be easily maintained or replaced onsite
Custom Automation Options	Pneumatic, electric, or hydraulic actuators with smart position feedback
Heavy-duty Bonnet Options	For high pressure, sub-zero, or vacuum conditions

Main Technical Parameters & Performance

Bi-directional sealing, floating seat, flow guiding hole, dual packing design, integral wafer type ultra-thin structure knife gate valve.
Design Standard	MSS SP-81
Size Range	DN50–DN600
Pressure Rating	PN10, PN16, ANSI 150Psi, 5K/10K
Rated Working Pressure	DN50~DN250: 10Bar DN300~DN450: 7Bar, DN500~DN600: 4Bar
Structure Length Standard	MSS SP-81
Flange Connection Standards	GB/T9113–2010, EN1092–2002, ASME B16.5–2013, ASME B16.47–2011, AS2129–2000, AS4087–2004, JIS B2220–2004
Valve Test Standard	MSS SP–81
Valve Body Materials	WCB, CF8, CF3, CF8M, CF3M, 4A, 5A, 904L
Temperature & Pressure Testing Standards	GB/T12224–2005, GB/T 21634–2009, ISO7005–1
Applicable Industries	Pulp and paper, mining, metallurgy, pharmaceuticals, food, wastewater treatment, municipal sewage, water conservancy, etc.
Actuation Modes	Manual, pneumatic, electric, gear, chain wheel drive

Through Conduit Knife Gate Valve Main Components and Materials

Material Configuration
Part	WCB	CF8	CE8M
Body	WCB	CF8	CF8M
Disc	20Cr13+Cr	20Cr13+Cr	2205+Cr
Seat	STL or EPDM
O-Ring	NBR
Seat Cover	WCB	CF8	CF8M
Packing	PTFE
Gland	WCB	CF8	CF8M
Bracket	Q235	304	304
Stem	2Cr13	2Cr13	2Cr13
Stem Nut	Brass	Brass	Brass
Bearing	65Mn	65Mn	65Mn
Support Base	WCB	WCB	WCB
Handwheel	GGG30 (Epoxy Coated)
Stem Protector	304	304	304
Fasteners	A2-70	A2-70	A4-70

Through Conduit Knife Gate Valve Dimensions

TOT valve can provide you with various sizes of through conduit knife gate valve. We have listed some through conduit type knife gate valve sizes for PN16 for your reference.

If you don’t have the through conduit type knife gate valve size you need, you can contact us immediately. Our professional sales manager will contact you and can provide you with exclusive ODM and OEM services.

Size		A	B	C	D	E	F	G	H	H1	Cylinder Size	Air Inlet Size
DN	NPS	A	B	C	D	E	F	G	H	H1	Cylinder Size	Air Inlet Size
50	2″	48	140	106	100	129	230	100	475	665	C100/60	F1/4
65	2-1/2″	48	175	106	135	147	245	100	540	895	C100/75	F1/4
80	3″	51	185	106	145	168	270	120	570	915	C125/85	F1/4
100	4″	51	220	106	150	192	300	120	605	925	C125/110	F1/4
125	5″	57	195	120	170	215	330	150	620	940	C160/135	F3/8
150	6″	57	225	130	175	245	350	150	775	1220	C160/160	F3/8
200	8″	70	280	130	215	302	440	195	950	1510	C200/210	F3/8
250	10″	70	356	140	270	355	505	240	1165	1875	C250/260	F3/8
300	12″	76	405	160	310	401	550	280	1285	2110	C300/310	F3/8
350	14″	76	480	180	330	465	620	380	1385	2330	C300/360	F3/8
400	16″	89	530	180	375	511	670	395	1530	2600	C320/410	F3/8
450	18″	89	610	240	420	580	710	395	1780	2965	C320/460	F3/8
500	20″	114	650	270	465	640	800	425	1915	3265	C350/510	F3/8
600	24″	114	805	270	500	740	910	425	2190	3860	C350/610	F3/8

Applications That Require High Reliability

This valve is ideal for isolation in your demanding applications where downtime is costly:

Pulp and Paper: Bleaching lines, stock preparation, black liquor isolation for high consistency pulp (≥ 12%), through conduit knife gate valve design effectively prevents fiber plugging and scaling

Mining and Mineral Processing: Full bore design eliminates attack from tailings, slurries containing sand, gravel or metal fines, acidic leachate, lime slurry or abrasive concentrate

Wastewater and Sludge Systems: Thickening sludge, grit chambers, backwash circuits, prevent horizontal pipe plugging

Power Generation (Thermoelectric/Biomass): Metal-to-metal seats withstand extreme temperatures for fly ash handling, gypsum slurries and bottom ash

Chemical and Petrochemical: Corrosive or high pH fluids, optional alloy construction for HCl, H₂SO₄ or NaOH applications