Source ductile iron gate valves for water supply, wastewater, industrial pipelines and selected mining services in South Africa. Solid Valve offers flanged, socket-end, spigot-end and knife gate valve configurations, allowing buyers to match the valve to the pipeline connection, pressure class, medium and installation method.
Our published ductile iron gate valve range includes DIN 3352 F4/F5, BS 5163 and AWWA C509/C515 configurations, with working pressure options of 10, 16 and 25 bar depending on valve type.
| Valve Configuration | When to Consider It | Information to Confirm |
|---|---|---|
| Flanged End Gate Valve | Flanged water networks, treatment plants, pump stations and industrial piping where bolted connections and future removal are required | DN, PN, flange standard/drilling, face-to-face dimension, stem type |
| Socket-End Resilient Seated Gate Valve | Water, sewage and wastewater pipelines using a compatible socket connection | Pipe material, pipe outside diameter, socket/joint requirement, DN, PN |
| Spigot End Gate Valve | Pipeline systems using plain/spigot ends with compatible couplings or connecting fittings | Pipe OD, connection arrangement, DN, working pressure |
| Ductile Iron Knife Gate Valve | Slurry, suspended solids and selected mining or wastewater services where a knife-style shut-off valve is required | Medium, solids content, DN, pressure, flange standard, seat and knife materials |
A knife gate valve should not automatically replace a resilient seated waterworks gate valve. The two products are designed around different service conditions and pressure ranges.
South African waterworks and infrastructure specifications may reference SANS 664 or SANS 665, while individual projects may also specify another approved standard.
Solid Valve's currently published ductile iron gate valve range covers DIN 3352 F4/F5, BS 5163 and AWWA C509/C515 configurations.
If your tender, consultant specification or existing pipeline requires a South African national standard, send the exact specification with the enquiry. Compliance, dimensional compatibility and documentation requirements should be confirmed before the valve is approved for the project.
Do not assume that two PN16 valves manufactured to different standards are interchangeable. Face-to-face dimensions, flange drilling, stem arrangement and approval requirements may differ.
For a flanged gate valve, provide more than the nominal diameter.
Your RFQ should identify:
DN or nominal pipe size
pressure rating
flange standard and drilling
mating pipe or fitting specification
required face-to-face dimension where replacement compatibility is important
Our published flanged gate valve range includes drilling according to DIN 2501, BS 4504 and ANSI B16.1 configurations.
Where your project specifies another drilling pattern, including a South Africa-specific flange requirement, send the flange table or drawing for technical confirmation before ordering.
For socket or spigot valves, specify the pipe material and actual outside diameter. The valve connection must match the existing pipeline system rather than only the nominal DN.
Choose a flanged design when the pipeline already uses mating flanges or when removal and replacement access is important.
Solid Valve offers flanged gate valves in rising-stem and non-rising-stem configurations, with published working pressure options of 10, 16 and 25 bar.
A socket-end valve can reduce the number of separate flange components in a compatible pipeline system. Selection depends on the pipe material, outside diameter and joint design.
Our published socket-end gate valve range includes 10, 16 and 25 bar working-pressure options, ductile iron body configurations and EPDM/NBR resilient wedge options for water, sewage and wastewater service.
Use a spigot-end valve where the pipeline connection is designed around a plain/spigot end and compatible coupling arrangement.
Our published spigot-end gate valve range covers DN50–DN300 with AWWA-based configurations and 200/250 psi working-pressure options.
Before quotation, provide the mating pipe OD and coupling or connection requirement.
For mining slurry, wastewater containing solids or other media where solids handling is the main selection issue, a knife gate valve may be more appropriate than a conventional resilient seated gate valve.
Our published ductile iron knife gate valve range covers DN40–DN2000 and pressure ratings from 2 to 10 bar, with an SS316 knife listed in the standard material configuration.
A non-rising stem keeps the operating height relatively compact because the stem does not travel upward as the valve opens. It is commonly considered where vertical space is limited or the valve is installed in an underground network.
A rising stem provides a visible indication of valve position but requires additional clearance above the valve.
Our flanged gate valve range is available in both rising and non-rising stem configurations.
When requesting a quotation, state:
Rising Stem / Non-Rising Stem + operator + closing direction
rather than specifying only the valve size.
Solid Valve's published gate valve options include ductile iron wedges with EPDM or NBR and metal-seated configurations.
Selection should be based on the actual medium and operating conditions.
EPDM is commonly considered for water service, while NBR may be selected where its fluid compatibility is more appropriate. A metal-seated design serves a different sealing requirement and should not be treated as an automatic substitute for a resilient-seated valve.
Provide the medium, operating temperature and project leakage or shut-off requirement before final material selection.
Published gate valve material options include:
Ductile iron GGG40/50 body
2Cr13, SS304 or SS316 stem
Zinc-plated carbon-steel, SS304 or SS316 bolts and nuts
EPDM, NBR or metal-seated wedge configurations
Internal and external fusion-bonded epoxy coating, with a published minimum coating thickness of 250 μm for applicable gate valve configurations
Higher-grade stainless components should be specified only where the project environment, water chemistry or tender specification requires them.
The published Solid ductile iron gate valve range includes:
| Working Pressure | Published Shell Test Pressure | Published Seal Test Pressure |
|---|---|---|
| 10 bar | 15 bar | 11 bar |
| 16 bar | 24 bar | 17.6 bar |
| 25 bar | 37.5 bar | 27.5 bar |
Pressure class should be selected from the project design pressure and specification rather than from pipe diameter alone.
For replacement or tender projects, include any required hydrostatic testing standard and certificate format in the RFQ.
Resilient seated flanged, socket or spigot gate valves are used as isolation valves in water-distribution systems because the valve is intended to operate fully open or fully closed.
For South African waterworks procurement, confirm the required valve standard, flange or pipe connection, PN class, closing direction and operator before selection.
In treatment plants, access for maintenance and compatibility with existing flanged pipework often make the connection standard and face-to-face dimension important.
Where the wastewater contains significant solids or fibrous material, do not assume a standard resilient seated water valve is suitable. Provide the solids condition so that a conventional gate valve and a knife gate valve can be evaluated separately.
Mining applications can range from relatively clean process water to abrasive slurry.
For clean or neutral water service, selection may follow conventional gate valve criteria such as PN, connection, seat and stem design.
For slurry or solids-bearing service, medium composition, solids content, particle condition and operating pressure become more important and may lead to a knife gate valve configuration.
Solid Valve can manufacture ductile iron valves according to customer-specified dimensions, shapes, materials and process requirements. Buyers can provide drawings, samples or written project specifications for technical review.
For South African projects, useful customization inputs include:
valve dimensions
body and internal materials
stem material
resilient seat material
connection dimensions
project-specific drawings
required manufacturing or inspection conditions
A request for a different national standard or flange drilling should always be submitted for engineering confirmation rather than assumed to be available.
Our ductile iron valve production process covers material preparation, melting, spheroidization and inoculation, casting, heat treatment, machining, inspection and testing.
Solid Valve also maintains a dedicated production and inspection section for checking valve quality against the corresponding product and customer requirements.
View our Production & Inspection and Inspection information.
Our website lists company and product-related certificates including ISO, CE, BSI and WRAS documentation. Because approval requirements vary by project and valve configuration, confirm the exact certificate required for your South African project rather than assuming that every certificate applies to every model.
View available Certificates or send the tender requirement through our Contact Page for confirmation.
Yes, you can send the tender specification, drawing and required standard for review. Our published standard range should not be assumed to be equivalent to a South African project standard without technical confirmation.
Non-rising stems are useful where installation height is limited. Rising stems provide visible valve-position indication but require more vertical clearance. The final selection should also follow the project specification.
No specific MOQ and that order requirements can be discussed according to the customer project.
Our published company FAQ states a 12-month warranty. Confirm the applicable warranty terms in the quotation and contract for the specific valve order.
Send the quantity, DN, PN, valve standard, connection, flange or pipe details, stem type, closing direction, medium and required documents. If a consultant or municipality has issued a technical specification, attach the complete relevant section rather than rewriting only part of the requirement.
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