Products / Flow Control

Diaphragm Valve

Direct answer

LibertyCES has documented Diaphragm Valve in 5 industries, including Direct Lithium Extraction (DLE), Lithium Battery Manufacturing and Recycling and Chemical Processing. Chemical compatibility is documented for Caustics/Bases. Documented models include Type-14 Flanged, Richter MV / MVP and Hayward DAB Series. Send James the fluid, concentration, temperature and flow for a free spec review.

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5 sector applications

Where LibertyCES specs Diaphragm Valve

1 chemical compatibility record

Chemical compatibility

Caustics/Bases

Manufacturer-documented

lime slurry / calcium hydroxide (Ca(OH)2)sodium hydroxide 50%caustic soda 70%aqueous ammonia 19%

Materials: EPDM diaphragm (Asahi's stated pairing for NaOH 50% and aqueous ammonia 19%) · 3-layer EPDM/PVDF/PTFE diaphragm · PVC and PP body per ASTM D1784 CC 12454-A and D4101 CC PP0210B67272 · Netafim ALD70 on caustic soda: Limit 15-50% @70°C, Limit 70% @38°C, Good 5% @50°C, Good 50% @100°C, Good 70% @50°C and @100°C

Asahi/America Type-14 Flanged Diaphragm Valve (weir design; bubble-tight sealing even with slurries and suspended particles; built-in travel stop prevents diaphragm overtightening; bayonet compressor-to-diaphragm connection) · Asahi/America Type-14 True Union Diaphragm Valve (PVC/EPDM pairing for 50% NaOH and 19% aqueous ammonia per the Advanced PE chart)

Models

Diaphragm Valve: models in the LibertyCES catalog

7 models across 7 product lines from 4 manufacturers. For most models that state them (the middle 80%): connection sizes 0.5–8 in; pressure to 363 psi (25.0 bar). Extremes are in the table.

Manufacturer-stated values from the documents cited in the last column. A blank cell means the document doesn’t state it. Confirm exact options with a spec review.
Model / line	Manufacturer	Type	Size / capacity / flow	Pressure	Temperature	Wetted material	Source
Type-14 True Union Diaphragm Valve 1/2in-2in	Asahi/America	Valve	1/2in-2in			thermoplastic	Asahi/America — General Catalog (Valves, Actuators, Piping Systems, Welding Equipment)
Thermoplastic Valves Type-14 Flanged Diaphragm Valve (metal-replacement spec)	Asahi/America	Valve	1/2in-4in	150 psi (10.3 bar)	to 70 °F (to 21 °C)	PVC/CPVC/PP/PVDF body+bonnet, EPDM or 3-layer EPDM/PVDF/PTFE diaphragm	Asahi/America — Thermoplastic Valves: Direct Replacement for Metal Valves
Sliding Stem Valves MV (Diaphragm Valve)	Richter Chemie-Technik	Valve	1"-6" / DN15-DN200, 16/10/7 bar (size dependent)	102 psi (7 bar)	to -22 °F (to -30 °C)	PFA lining, TFM-PTFE diaphragm with EPDM support	Richter Chemie-Technik — Sliding Stem Valves
Diaphragm Valves DAB Series	Hayward Flow Control	Valve	1/2"-6"			PVC or CPVC body, EPDM/FPM/PTFE diaphragm, optional PVDF vapor barrier	Hayward Flow Control — Mining & Water/Waste Treatment Segment Pages
75 Series Diaphragm Valve	Netafim	Valve	3/4"-8"R	174 psi (12 bar)	12 bar max	polypropylene	Netafim Mining — Heap Leaching Products Catalog
90 Series Diaphragm Valve	Netafim	Valve	-	145 psi (10 bar)	10 bar max	PVC body / PPS bonnet	Netafim Mining — Heap Leaching Products Catalog
100 Series Diaphragm Valve	Netafim	Valve	-	363 psi (25 bar)	25 bar max	cast iron/ductile iron/bronze/stainless	Netafim Mining — Heap Leaching Products Catalog

This table is part of the equipment catalog dataset (CSV and JSON).

Related Guides

Technical guides for Diaphragm Valve

Sodium Hypochlorite Valve Material Selection Guide →EPDM Compatibility Guide — Chemical Resistance & Valve Seals →EPDM Chemical Compatibility Chart — Valves, Seals & O-Rings →

FAQ

Frequently Asked Questions

What industries use Diaphragm Valve?

LibertyCES has documented Diaphragm Valve specified across 5 sector applications, including Direct Lithium Extraction (DLE), Lithium Battery Manufacturing and Recycling, Chemical Processing and Municipal Water & Wastewater.

How is Diaphragm Valve used in Direct Lithium Extraction (DLE)?

Asahi specifically recommends the Type-14 for DLE valve automation — chosen for abrasive-slurry and corrosive-brine tolerance without clogging or corroding, because the top-entry design means only body and diaphragm touch the brine. Clearest vendor-stated valve-type recommendation for DLE in the corpus. — examples include Asahi/America Type-14 True Union Diaphragm Valve (PVDF / PTFE / EPDM diaphragm options, top-entry design isolating the bonnet from the fluid). This is well-documented in LibertyCES's field data.

Can Diaphragm Valve handle Caustics/Bases?

Diaphragm Valve has documented compatibility with Caustics/Bases Materials to confirm: EPDM diaphragm (Asahi's stated pairing for NaOH 50% and aqueous ammonia 19%), 3-layer EPDM/PVDF/PTFE diaphragm, PVC and PP body per ASTM D1784 CC 12454-A and D4101 CC PP0210B67272, Netafim ALD70 on caustic soda: Limit 15-50% @70°C, Limit 70% @38°C, Good 5% @50°C, Good 50% @100°C, Good 70% @50°C and @100°C. Specific chemicals include lime slurry / calcium hydroxide (Ca(OH)2), sodium hydroxide 50%, caustic soda 70%, aqueous ammonia 19%.

Spec Review

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Reviewed by James Riggins, 30+ years specifying water and chemical process equipment · Updated October 13, 2026

Where LibertyCES specs Diaphragm Valve

Direct Lithium Extraction (DLE)

Lithium Battery Manufacturing and Recycling

Chemical Processing

Municipal Water & Wastewater

Semiconductor / High Purity