OEM Valve Solutions

Water Treatment Valves for Equipment Manufacturers

Industrial valve solutions for filtration systems, reverse osmosis units, chemical dosing skids, wastewater treatment equipment, desalination packages and packaged pump systems. Engineered around your media, operating conditions, installation space and equipment BOM.

Explore Valve Options Discuss a Project

Application-based selection
Pneumatic and electric actuation
Drawings, CAD and inspection records

Electric actuated butterfly valve — 01
**Automated Isolation**Electric butterfly valve

Stainless steel swing check valve — 02
**Backflow Protection**Stainless swing check valve

01 / Engineering Application-based selection

Valve type and materials matched to process conditions and equipment function.

02 / Automation Complete actuated packages

Actuator, solenoid, switches and fail-safe configuration reviewed as one package.

03 / Documentation Technical approval support

Datasheets, drawings, testing records and traceability prepared for project approval.

04 / Supply Repeatable equipment BOM

Stable specifications across project orders, repeat orders and spare-parts demand.

Water Treatment Valve Solutions

Industrial Valves for Water and Wastewater Treatment Equipment

Water treatment valves control, isolate and protect flow paths inside complete treatment systems. For an equipment manufacturer, the valve must fit the installation space, match the piping standard, resist the process media and integrate with the machine control system.

We support OEM skid builders and system integrators working with filtration, reverse osmosis, wastewater treatment, chemical dosing, desalination and packaged pumping equipment.

Application coverage Water treatment valves Wastewater treatment valves RO system valves Filtration equipment valves Chemical dosing skid valves Desalination valves

Butterfly valves

Compact isolation and backwash control for large-diameter water lines, filters and packaged treatment systems.

Ball valves

Tight shut-off for chemical dosing, drains, samples, bypasses and compact skid-mounted pipework.

Check valves

Reverse-flow protection for pumps, membranes, transfer lines and equipment discharge connections.

Diaphragm valves

Process isolation for corrosive dosing chemicals, clean water and high-purity treatment duties.

Knife gate and slurry valves

Solids-handling solutions for wastewater, sludge and abrasive media where clogging resistance matters.

Actuated valve assemblies

Pneumatic and electric packages with solenoids, switches, positioners and defined fail-safe functions.

Equipment Applications

Designed Around Water Treatment Equipment

A valve becomes part of the finished machine. Dimensions, pressure loss, operating torque, media compatibility and control method all affect the final equipment design.

Filtration Systems

Isolation, backwash, drain and bypass valves for media filters, bag filters and automatic filtration equipment.

Reverse Osmosis Units

Valves for feedwater, concentrate, permeate, flushing and CIP circuits in membrane treatment systems.

Chemical Dosing Skids

Corrosion-resistant options for acids, alkalis, coagulants, disinfectants and regeneration chemicals.

Wastewater Equipment

Butterfly, check, knife gate and slurry valves for wastewater, sludge, aeration and solids handling.

Pump Packages

Check, isolation and pressure-control valves for booster sets, transfer skids and packaged pumping systems.

Desalination Systems

Material and sealing options for seawater, brine, chemical cleaning and high-chloride environments.

Modern industrial water treatment piping with visible valves and instrumentation

Valves in Water Treatment Equipment

Where Valves Operate Inside an RO Skid

A single RO package contains several valve duties. Each position must be selected according to flow function, pressure, media, available space, maintenance access and automation level.

Feed-water isolationSeparates the skid from upstream piping and individual process stages.

Pump protectionIsolation and check valves support safe pump operation and maintenance.

Membrane flow routingControls feed, permeate, concentrate, flushing and cleaning circuits.

CIP and chemical cleaningRoutes compatible cleaning fluids through membranes and pipework.

Drain, bypass and samplingSupports commissioning, depressurization, drainage and troubleshooting.

Valve selection should be confirmed together with the full equipment BOM, pipe layout, actuation accessories, inspection scope and replacement strategy.

Technician inspecting stainless steel filtration and process equipment

OEM Integration Valve selection must support the complete equipment layout.

Procurement Priorities

What Equipment Builders Need From a Valve Supplier

Procurement teams evaluate cost and delivery. Engineers evaluate compatibility, installation, performance and documentation. A qualified OEM valve package must support both.

Material compatibilityBody, trim and seat materials verified for water, chemicals, seawater, sludge and cleaning media.

Controlled dimensionsFace-to-face, flange standards and actuator interfaces remain consistent across repeat orders.

Automation as one packageValve torque, actuator sizing, switches, solenoids and fail-safe position are reviewed together.

Inspection evidencePressure tests, leakage tests, material certificates and traceability organized for project approval.

Featured Valve Types

Technical Product Data

The product drawings remain visual references, while the performance data, materials, specifications and dimensions are now structured as searchable, responsive HTML tables.

Check Valve for Water Treatment Systems

H44W ANSI Swing Check Valve

The H44W ANSI swing check valve is designed for automatic reverse-flow prevention in pump discharge lines, filtration systems, packaged pump stations and industrial water treatment piping. Its flanged construction supports common ANSI pipeline layouts, while multiple carbon-steel and stainless-steel body grades allow the valve to be selected for clean water, process water, steam, oil and selected corrosive media.

For equipment manufacturers, the main selection factors include pressure class, face-to-face dimension, flow direction, installation orientation, minimum flow velocity and the potential for water hammer. The valve can be considered where a robust mechanical check valve is required without an external actuator or control signal.

Pressure classesClass 150, 300, 600, 900, 1500 and 2500

DesignBS 1868 / API 6D / ASME B16.34

ConnectionASME B16.5 / ASME B16.47 Series A

TestingAPI 598 / API 6D

H44W swing check valve dimensional drawing

Performance Parameters

Pressure values in MPa

No.	Parameter	150 Lb	300 Lb	600 Lb	900 Lb	1500 Lb	2500 Lb
1	Nominal pressure PN	2.0	5.0	10.0	15.0	25.0	42.0
2	Shell strength test pressure	1.5 times the nominal pressure at room temperature
3	High-pressure sealing test pressure	1.1 times the nominal pressure at room temperature
4	Nominal pressure at room temperature	According to the ASME B16.34 pressure-temperature rating

Product Specification

Design and inspection standards

DesignBS 1868 / API 6D / ASME B16.34

Face-to-faceASME B16.10

Connecting flangeASME B16.5 / ASME B16.47 Series A

Test and inspectionAPI 598 / API 6D

Main Components and Materials

Material combinations by body grade

Part	WCB	WC6	CF8	CF8M	CF3	CF3M
Body	A216 WCB	A217 WC6	A351 CF8	A351 CF8M	A351 CF3	A351 CF3M
Valve cover	A216 WCB	A217 WC6	A351 CF8	A351 CF8M	A351 CF3	A351 CF3M
Valve disc	A216 WCB	A217 WC6	A351 CF8	A351 CF8M	A351 CF3	A351 CF3M
Sealing face	13Cr / STL	STL	Body / STL	Body / STL	Body / STL	Body / STL
Tige	A182 F6a	A182 F11	A182 F304	A182 F316	A182 F304L	A182 F316L
Gasket	304 + flexible graphite / soft iron	304 + flexible graphite / F304	304 + flexible graphite / F304	316 + flexible graphite / F316	304L + flexible graphite / F304L	316L + flexible graphite / F316L
Stud	A193 B7	A193 B16	A193 B8	A193 B8M	A193 B8	A193 B8M
Nut	A194 2H	A194 4	A194 8	A194 8M	A194 8	A194 8M
Temperature range	-29 to 425°C	-29 to 540°C	-46 to 425°C	-46 to 425°C	-46 to 425°C	-46 to 425°C
Typical media	Water, steam and oil	Water and steam	Corrosive media	Corrosive media	Corrosive media	Corrosive media

Class 150 Flanged-End Dimensions

Dimensions in mm

Size	d	L	D	C	g	T	t	H	n-Φ
1/2"	15	108	89	60.5	35	12	1.6	–	4-15
3/4"	20	117	98	70.0	43	12	1.6	–	4-15
1"	25	127	108	79.5	51	12	1.6	–	4-15
1-1/4"	32	140	117	89	64	13	1.6	–	4-15
1-1/2"	40	165	127	98.5	73	15	1.6	–	4-15
2"	50	203	152	120.5	92	16	1.6	161	4-19
2-1/2"	65	216	178	139.5	105	18	1.6	180	4-19
3"	80	241	190	152.5	127	19	1.6	190	4-19
4"	100	292	229	190.5	157	24	1.6	203	8-19
5"	125	330	254	216	186	24	1.6	229	8-22
6"	150	356	279	241.5	216	26	1.6	257	8-22
8"	200	495	343	298.5	270	29	1.6	292	8-22
10"	250	622	406	362	324	31	1.6	355	12-25
12"	300	698	483	432	381	32	1.6	396	12-25
14"	350	787	533	476	413	35	1.6	445	12-29
16"	400	864	597	540	470	37	1.6	490	16-29
18"	450	978	635	578	533	40	1.6	520	16-32
20"	500	978	698	635	584	43	1.6	546	20-32
24"	600	1295	813	749.5	692	49	1.6	880	20-35
26"	650	1295	786	744.5	711	41	1.6	910	36-22
28"	700	1448	837	795.5	762	44	1.6	935	40-22
30"	750	1524	887	846.0	813	44	1.6	970	44-22

Butterfly Valve for Water Treatment Equipment

SD343H Telescopic Butterfly Valve

The SD343H telescopic butterfly valve combines a flanged butterfly valve and an axial expansion section in one assembly. It is intended for water treatment pipelines where shut-off or regulation must be combined with installation adjustment, pipeline movement compensation or easier valve removal.

This configuration can be used in water supply, drainage, filtration, cooling-water and industrial treatment systems. Equipment designers should confirm the available axial adjustment range, flange dimensions, pipeline restraint, valve operating torque and whether the valve is intended for isolation or throttling duty.

Reference modelSD343H-10C

Nominal sizeDN50 to DN600

DesignGB/T 12238-1989

Inspection and testJB/T 9092-1999

SD343H telescopic butterfly valve product image

SD343H telescopic butterfly valve dimensional drawing

Application Specification

Reference standards

Design and manufactureGB/T 12238-1989

Face-to-faceGB/T 12221-2005

Connecting flangeGB/T 9113-2000

Inspection and testJB/T 9092-1999

Product Characteristics and Uses

This butterfly valve combines a butterfly valve and expansion section in one assembly. It permits axial adjustment within a defined range, helps absorb thermal expansion and contraction, reduces the effect of pipeline vibration and simplifies installation or removal. Typical applications include water treatment, water supply and drainage, industrial piping and other systems requiring shut-off or flow regulation.

SD343H-10C Dimensions

Dimensions in mm

DN	L	Lmax	Lmin	D	D1	D2	D0	b	H	H1	W	W1	Z-Φd
50	150	163	138	165	125	99	157	20	360	112	195	185	4-18
65	170	188	158	185	145	118	157	20	380	115	195	185	4-18
80	180	192	162	200	160	132	157	20	455	120	195	185	8-18
100	190	225	180	220	180	156	157	22	490	140	195	185	8-18
125	200	235	190	250	210	184	205	22	490	170	268	250	8-18
150	210	240	195	285	240	211	205	24	630	180	268	250	8-22
200	230	265	215	340	295	266	235	24	690	210	305	300	8-22
250	250	285	235	395	350	319	235	26	830	240	305	300	12-22
300	270	302	252	445	400	370	296	26	930	290	415	400	12-22
350	290	321	271	505	460	429	296	26	1010	320	415	400	16-22
400	310	343	283	565	515	480	296	26	1070	350	415	400	16-26
450	330	360	300	615	565	530	400	28	1140	380	475	420	20-26
500	350	380	320	670	620	582	400	28	1200	410	475	420	20-26
600	390	425	365	780	725	682	400	34	1340	470	475	420	20-30

The numerical data has been transcribed from the supplied catalogue screenshots. Please verify all figures against the final approved product catalogue before publication.

Valve Selection for Equipment Manufacturers

How to Specify Water Treatment Valves for an OEM Project

A complete technical brief reduces quotation changes, unsuitable materials, actuator sizing errors and installation conflicts.

Define the valve function

Isolation, throttling, reverse-flow protection, pressure control, draining, sampling, backwash or sequencing.

Identify the exact media

Water quality, chemical name, concentration, chloride content, solids, pH and cleaning fluids.

Confirm operating conditions

Normal and maximum pressure, temperature, flow rate, cycle frequency, surges and vacuum conditions.

Specify dimensional standards

Nominal size, end connection, face-to-face requirement, installation envelope and actuator orientation.

Define automation requirements

Air pressure or voltage, opening time, fail position, control signal, enclosure and feedback.

List approval documents

Datasheets, drawings, CAD files, material certificates, pressure tests and customer part numbers.

Selection Guidance

Match Valve Construction to the Process

Media chemistry, solids content, pressure, temperature, cycle frequency and control function should all be evaluated before confirming valve type and material.

Application	Typical media	Common valve types	Key purchasing concerns
RO and membrane systems	Feedwater, permeate, concentrate, CIP fluid	Butterfly, ball, check, diaphragm	Compact size, leakage performance, corrosion resistance and automated cycling
Chemical dosing skids	Acid, alkali, sodium hypochlorite, coagulant	Diaphragm, ball, needle, check	Material compatibility, low dead volume and leak prevention
Filtration equipment	Raw water, treated water, backwash water	Butterfly, ball, check	Cycle life, actuator sizing and repeatable positioning
Wastewater and sludge	Wastewater, sludge, solids-bearing fluid	Knife gate, butterfly, pinch, check	Clogging resistance, abrasion and maintenance access
Pump packages	Clean water, process water, seawater	Check, butterfly, gate, control	Water hammer, reverse flow, pressure loss and installation orientation
Desalination systems	Seawater, brine, cleaning chemicals	Butterfly, ball, check, diaphragm	Chloride corrosion, elastomer selection and high-pressure service

OEM Support

Built for Equipment BOMs, Not One-Off Valve Sales

The objective is to reduce design changes, simplify sourcing and maintain stable valve configurations across multiple machines, skids and repeat projects.

Engineering review

Review media, pressure, temperature, connection, orientation, cycle frequency and fail-safe requirements.

BOM standardization

Align materials, seats, actuator sizes, accessories and customer part numbers across equipment models.

Technical documentation

Datasheets, dimension drawings, CAD or STEP files, manuals and project document packages.

Inspection and traceability

Pressure and leakage test records, material certificates, inspection photos and batch traceability.

Actuated valve assembly

Pneumatic or electric actuator matching with solenoids, limit switches, positioners and fail-safe functions.

Project-based supply

Mixed sizes, staged deliveries, customer labels, spare-parts planning and repeat-order control.

OEM Water Treatment Valve Supply for Repeat Production

A repeatable OEM valve package can include butterfly valves, ball valves, check valves, diaphragm valves and actuated assemblies organized around the equipment BOM. Standardized materials, dimensions, actuator accessories and inspection requirements help reduce engineering changes and simplify purchasing.

Typical applications include industrial water treatment systems, wastewater equipment, RO skids, membrane filtration, chemical dosing units, desalination equipment, pump packages, backwash systems, water recycling systems and packaged treatment plants.

Specification Workflow

From Equipment Parameters to a Confirmed Valve Package

A structured technical review helps reduce unsuitable materials, oversized actuators, installation conflicts and last-minute BOM changes.

Share the application

Equipment type, flow function, quantity and project location.

Confirm conditions

Media, concentration, pressure, temperature, solids and cycle frequency.

Select construction

Valve type, body, trim, seat, connection and applicable standards.

Match automation

Actuator torque, power supply, air pressure, feedback and fail position.

Approve documents

Datasheet, drawing, customer part number, test scope and delivery plan.

FAQ

Water Treatment Valve Questions

Common questions from equipment manufacturers, process engineers, system integrators and purchasing teams.

Which valves are commonly used in water treatment equipment?

Butterfly, ball, check, diaphragm, knife gate and control valves are commonly used. The correct type depends on whether the valve provides isolation, regulation, reverse-flow protection, chemical dosing or solids handling.

How should valves be selected for chemical dosing skids?

Confirm the exact chemical, concentration, temperature and pressure before choosing body and seat materials.

What documents do equipment manufacturers normally request?

Typical requirements include datasheets, dimensional drawings, CAD files, pressure test reports, material certificates, inspection records and installation manuals.

What information is needed to quote valves for a water treatment skid?

Provide valve type or function, size, pressure, temperature, media, body and seat preference, connection standard, actuation requirements, quantity, drawing requirements and the equipment or project delivery schedule.

What valves are suitable for reverse osmosis systems?

RO systems often use compact butterfly or ball valves for isolation, check valves for reverse-flow protection and diaphragm valves for chemical dosing or CIP circuits.

Can automated valves be supplied for filtration systems?

Yes. Pneumatic or electric butterfly and ball valve packages can be configured with solenoid valves, limit switches, positioners and fail-safe functions.

Which materials are commonly used for water treatment valves?

Common options include carbon steel, ductile iron, stainless steel, PVC, CPVC, PP and lined constructions. Seats and seals may include EPDM, NBR, FKM or PTFE. The correct selection depends on water chemistry, chemical concentration, temperature, pressure and required service life.

Project Enquiry

Need a Valve Package for Your Water Treatment Equipment?

Share the equipment type, media, pressure, temperature, size range and preferred automation method. We can review the application around your equipment BOM.

inquiry@fleyendaflow.com

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