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    • Industrial Gate Valves

    Source industrial gate valves from India's verified manufacturers and exporters on Himalay. Browse the full range for industrial and export applications.

    Showing 2 items
    2 items
    operation type
    Gear
    Handwheel
    body material
    A105
    Cast Iron
    Cast Steel
    SS304
    SS316
    end connection
    Flanged
    seat material
    Metal Seated
    trim material
    SS304
    SS316
    Non-Rising Stem Gate Valve
    Non-Rising Stem Gate Valve$20 - $150
    OS&Y Gate Valve
    OS&Y Gate Valve$40 - $400
    Industrial Gate Valves sourcing

    About Industrial Gate Valves

    Knife gate valves across 14,472 listed configurations — uni-directional and bi-directional, wafer and lug body styles, DN50 to DN1200 — for slurry, pulp and bulk-solids isolation. Submit an RFQ.

    Knife gate valves isolate flow with a thin, sharp-edged gate that shears through slurry, fibrous or solids-laden media rather than fighting past it — the design that lets a gate valve handle pulp stock, mining slurry and wastewater sludge where a conventional gate would tend to pack and jam. Himalay lists knife gate valves in two configurations: uni-directional, which seats in one flow direction and is the standard build under MSS SP-81, and bi-directional, which uses dual-seat encapsulation to seal from either direction and must be specified explicitly. The catalogue spans 14,472 configurations from DN50 to DN1200. All listed classes are PN10, PN16 or ASME 150. Bodies are cast iron, ductile iron, SS316 or SS304, all cast construction. Discs are SS316 or SS304; seats are EPDM, NBR or metal-seated. Body style is wafer or lug — the same as end connection on this family, since a knife gate has no independent flange of its own. Operation is manual handwheel or gear, pneumatic, electric, or bare stem for direct actuator mounting. Design follows MSS SP-81, which standardises compact face-to-face dimensions and metal-seat leakage limits, together with EN 12266 for testing. State medium, solids content, size, body style, seat material and direction of seal in your enquiry.

    Buyer guide

    Specifying Knife Gate Valves: Direction, Body Style, Seat and Size

    01

    What the thin gate solves

    Conventional gate valves rely on a wedge seating into a body cavity — fine for clean fluids, but a cavity that fills with slurry, pulp fibre or sludge tends to jam. A knife gate replaces the wedge with a flat, sharp-edged blade that shears straight through the solids as it closes, and the body has minimal dead pocket for material to pack into compared with a wedge-seated design. This is a large part of the rationale for the family, and it is why knife gates are commonly specified for mining, pulp and paper, and wastewater isolation rather than general clean-service plant.

    02

    Direction first

    MSS SP-81's base design is uni-directional — the seat is optimised for pressure from one side, matching most real installations (downstream of a pump, below a gravity tank). Bi-directional construction, with dual-seat encapsulation, is a distinct specification, not a safer default — request it only where the line genuinely reverses.

    03

    Body style is the end connection

    Wafer bodies clamp between two pipe flanges; lug bodies carry independent bolting so one side of the line can come off without releasing the other — the deciding factor is whether the valve sits mid-line or must hold pressure with one side of piping removed. Both are listed across the full DN50–DN1200 range.

    04

    Materials

    Cast iron and ductile iron bodies cover general water and utility slurry duty at lower cost; SS316 and SS304 answer corrosive or hygienic requirements. Discs match in SS316 or SS304. Seat selection follows the medium: EPDM for water and general slurry, NBR where oils are present, metal-seated for abrasive or hot service beyond elastomer limits.

    05

    Size is where knife gates win

    At DN1200, the top of the listed range, the thin-blade construction keeps weight and manufacturing cost a fraction of an equivalent-bore gate, ball or butterfly valve — which is why large tailings, dredging and bulk-water lines commonly specify knife gates.

    06

    Actuation

    Manual handwheel suits smaller, infrequently operated valves; manual gear extends practical hand operation into the larger sizes where torque climbs; pneumatic and electric actuation serve automated and remote duty; bare stem allows a third-party actuator to be fitted directly per the buyer's own specification.

    07

    Standards

    MSS SP-81 fixes compact face-to-face dimensions and a realistic 40 cc/min leakage allowance for metal seats — a looser tolerance than a bubble-tight soft-seated valve, reflecting the family's slurry-service role rather than precision shutoff. EN 12266 governs testing on catalogue SKUs.

    08

    Conformity

    CE for the EU, SABER for Saudi Arabia, ECAS for the UAE, EN 10204 3.1 certificates as the EU procurement baseline.

    From spec to RFQ

    State medium and solids content, direction of seal required, size, body style, seat material, actuation and destination market. Share the line drawing or slurry data sheet with your RFQ and the configuration is matched against the catalogue directly.

    Submit an enquiry →
    Technical guide

    How Knife Gate Valves Work

    Mechanism: a blade, not a wedge, so the valve cuts through the medium instead of trapping it

    Conventional gate valves shut a bore with a wedge-shaped disc dropping into a body cavity, but "for plastic solids and high-viscosity slurries such as paper pulp, a specialty valve known as a knife gate valve is used to cut through the material to stop the flow" — the gate itself is "usually not wedge shaped" but carries "a tapered knife-like edge on its lower surface" instead. Sealing is unforgiving by design: on a knife gate, "complete sealing occurs only at the final closure point and no over-travel is feasible," which is why precise gate travel, not just gate presence, is what determines whether the valve actually holds. Direction of seal is a separate design choice layered on top of the blade: trade literature distinguishes "uni-directional valves" from "bi-directional perimeter seal slurry valves," the latter built to hold pressure from either side rather than the one direction a standard knife gate seat is optimised for.

    Industries served: wherever a conventional valve would pack, jam or wear out on solids

    In pulp and paper stock preparation, "the most common valves... are knife gate valves," with seat choice driven by the exact duty — "a metal-seated knife gate valve rated for full-reverse pressure" for moderate-consistency stock, and "a perimeter resilient-seated knife gate valve" for lower-consistency, on/off service. Beyond pulp and paper, the same construction is specified for bulk-solids handling — valves "installed horizontally when installing a vertical pipe, transporting dry solids, pellets and powders, and when releasing dry, free-flowing materials from gravity-fed hoppers, mixers and silos." That range, wet slurry at one end and dry free-flowing solids at the other, lines up with Himalay's own body and seat spread: cast iron and EPDM for general slurry duty, metal-seated construction for abrasive, high-solids service.

    Standards landscape: sized and rated for a specific construction, not a general-purpose valve code

    MSS SP-81 "covers... stainless-steel or stainless-steel-lined, cast, or fabricated bonnetless, knife gate valves with flanged ends from size NPS 2 (DN 50) through NPS 36 (DN 900)," and states that "the valves identified in this Standard Practice are intended for use in applications where shock loadings are not encountered" — a scope limit that matters on pump-adjacent or hydraulic-hammer-prone slurry lines. Within that scope it also fixes compact face-to-face dimensions and a 40 cc/min metal-seat leakage allowance — a looser tolerance than a bubble-tight soft-seated valve, reflecting an isolation rather than precision-shutoff role. EN 12266 governs the testing procedure applied to catalogue SKUs alongside it. Sources: [Wikipedia — Gate valve](https://en.wikipedia.org/wiki/Gate_valve); [Valve Magazine — Proper Care of Knife Gate and Slurry Valves](https://www.valvemagazine.com/articles/proper-care-of-knife-gate-and-slurry-valves); [Valve Magazine — Valve Selection in Pulp and Paper Operations](https://www.valvemagazine.com/articles/valve-selection-in-pulp-and-paper-operations); [Valve Magazine — Horizontal Knife Gate Valves: Challenges and Solutions](https://www.valvemagazine.com/articles/horizontal-knife-gate-valves-challenges-and-solutions); [Sky Bear Standards — MSS SP-81-2021 scope](https://www.skybearstandards.com/documents/mss-sp-81-2021-stainless-steel-or-stainless-steel-lined-bonnetless-knife-gate-valves-with-flanged-ends/)

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    Frequently Asked Questions

    Uni-directional or bi-directional — which do I need?
    Wafer or lug body — does it matter for a knife gate valve?
    Which seat material suits my medium?
    Are knife gate valves economical at very large sizes?
    What actuation options are available?
    What conformity documentation applies for EU, Saudi and UAE imports?
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