ITT Grinnell Replacement Diaphragms

What Replacement Diaphragms are offered by ITT Grinnell?

The Grinnell product line has undergone ownership changes over the last couple of decades. To understand which division to contact for each type of diaphragm, it is important to outline the different diaphragms that were central to the Grinnell product line.

ITT Grinnell Replacement Diaphragms

Chemical

Dia-Flo Diaphragm Valves, available in a wide variety of metals, solid plastics, plastic, rubber, and glass linings, are well suited to the handling of multiple chemical applications. Sulfuric acid, hydrochloric acid, hydrofluoric acid, and sodium hydroxide are typical applications handled by Dia-Flo Diaphragm Valves. The broad selection of body materials and ITT Grinnell Replacement Diaphragms typically provide a chemically compatible and economical solution for almost any process system not exceeding 200 psi (13.8 bar) or 350ºF (177ºC)1. Available in weir and straightway designs, both manual or automated, the Dia-Flo Diaphragm Valve is capable of handling clear fluids as well as slurries. Contact us for product details and an offer by submitting an RFQ form.

Water Treatment

Dia-Flo Diaphragm Valves, due to their versatility in body and diaphragm materials, provide an economical solution for demineralizers, deionizers, reverse osmosis systems, and filtration systems. The typical valves utilized in these systems are Dia-Flo Weir Diaphragm Valves with PP (Polypropylene) or Tefzel® ETFE lining, Teflon® PTFE, or EPDM ITT Grinnell Replacement Diaphragms with either manually operated or DiaFlo pneumatically operated actuators. Typical accessories include limit switches, adjustable opening stops, and handwheel opening devices. Contact us for product details and an offer by submitting an RFQ form.

Power

Dia-Flo Diaphragm Valves are used extensively in demineralized systems, FGD (flue gas desulfurization) systems, chemical systems, and radioactive waste handling systems. The typical valve selected by OEMs and end-users for demineralizers is Dia-Flo Weir Diaphragm Valves with PP or Tefzel® ETFE lining, Teflon® PTFE, or EPDM ITT Grinnell Replacement Diaphragms with Dia-Flo pneumatic actuators and required accessories. FGD systems commonly utilize Dia-Flo Straightway Valves with rubber linings to handle abrasive and corrosive process media. The nuclear industry utilizes the Dia-Flo Diaphragm Valve manufactured in accordance with nuclear standards. ITT Engineered Valves Group maintains an “N” stamp. Contact us for product details and an offer by submitting an RFQ form.

Pulp & Paper 

One of the largest industrial users of chemicals, pulp and paper plants frequently utilize Dia-Flo Diaphragm Valves and ITT Grinnell Replacement Diaphragms in water treatment, chemical, bleaching, and coating processes. The DiaFlo Straightway Valve is utilized for slurry services, such as titanium dioxide and lime mud. The Dia-Flo Weir Valve is utilized in clear fluid services typical of the water treatment, chemical handling, and coating processes. Contact us for product details and an offer by submitting an RFQ form.

Mining

Dia-Flo Diaphragm Valves, both weir and straightway, are installed in various process lines within gold, copper, zinc, and phosphate mines. Common applications for ITT Grinnell Replacement Diaphragms include chemical feed, process feed, metal refinery, and filter press lines. The Dia-Flo Straightway Diaphragm Valve, due to the unobstructed flow path and minimal cavities, is well suited for handling abrasive and corrosive slurry applications in line sizes 1/2″ to 12″. The chemical feed and process feed areas typically utilize clearer fluids and utilize the Dia-Flo Weir Diaphragm Valve. Contact us for product details and an offer by submitting an RFQ form.

Pharmaceutical and Bioprocessing

Due to the streamlined flow path and minimal cavities, Pure-Flo® hygienic diaphragm valves minimize contamination and micro-organism growth in high purity water systems. Available in 316L stainless steel forged and cast bodies with either quick disconnect or buttweld end connections, the Pure-Flo diaphragm valve and Pure-Flo fabrications are designed to minimize contact surfaces, hold-up volume, and space envelope. All contact materials are FDA compliant. Dia-Flo Weir Diaphragm Valves are commonly utilized on the chemical side of pharmaceutical manufacturing. Similar to the Pure-Flo hygienic diaphragm valve, Dia-Flo Diaphragm Valves are available in FDA compliant bodies and ITT Grinnell Replacement Diaphragms variety of diaphragm materials. FDA compliant plastic linings, solid plastic, and 316 stainless steel body materials are available. Contact us for product details and an offer by submitting an RFQ form.

Electronics

The stringent cleanliness requirements of the high purity water and high purity chemical systems in the semiconductor industry may be met with the Dia-Flo solid plastic weir diaphragm valve. Available in four solid plastic materials, including unpigmented grade 6000HD PVDF, the Dia-Flo Diaphragm Valve with a two-piece Teflon® PTFE diaphragm minimizes particle generation and entrapment as a result of superior quality, ITT Grinnell Replacement Diaphragms. Contact us for product details and an offer by submitting an RFQ form.

Also – “Common Applications” boxes

The Dia-Flo Diaphragm Valve is typically one of the most economical valve solutions in chemical applications due to the wide choice of wetted materials.

Features and Benefits 

The Dia-Flo Diaphragm Valve is typically one of the most economical valve solutions in chemical applications due to the wide choice of wetted materials. 

• Broad Material Availability: Given the various body and diaphragm materials, the Dia-Flo Diaphragm Valve often provides the most economical solution for your process system, within the valve’s design parameters. See page 15 for specific materials, end connections, and sizes. 

• Slurry Applications: Due to the streamlined flow path and the virtual absence of cavities, the diaphragm valve is ideal for slurry applications. Cavities within valves tend to entrap solids, either increasing the valve’s operational torque or inhibiting operation. The Dia-Flo Weir Diaphragm Valve is recommended for slurries containing 15% or fewer solids. For slurries exceeding 15% solids, the Dia-Flo Straightway Diaphragm Valve is recommended. 

• High Purity Applications: The Dia-Flo Diaphragm Valve is the proven selection to minimize particle generation and product entrapment inherent to other valve types. 

• Corrosive Applications: A broad selection of plastic linings and PTFE diaphragms, coupled with our corrosion-resistant coatings, provide an excellent barrier to chemical attack and corrosion. In addition to our standard blue primer coating, PVDF and white epoxy coatings are available. 

• Bubble Tight Shut-off: Dia-Flo Weir Diaphragm Valves provide bubble-tight shut-off from 0.1 microns to 200 psi line in accordance with MSS SP-88 (Manufacturers Standardization Society of the Valves and Fittings Industry, Inc. Standard Practice– Diaphragm Valves). 

• Bonnet Isolation: Working parts are isolated from the process fluid. 

• Secondary Containment: The optionally sealed bonnet provides a secondary containment boundary in the case of diaphragm failure; preventing the process media from entering the atmosphere. 

• Unique Features: Unique features which optimize the valve performance and life, varying by valve size are: adjustable travel stop, protective stem cap, o-ring sealed stem, bronze bushing, Line-Lok® for plastic-lined valves, yellow position indicator, molded closed diaphragms, and PVDF corrosion-resistant coating. 

• Vacuum Applications: The diaphragm valve is capable of bubble-tight shut-off down to 0.1 microns. Elastomer or Teflon® PTFE diaphragms may be used. The in-leakage rate is less than 1 x 10-6 cc-atm/sec for elastomer diaphragms and can be less upon request.

Dia-Flo Solid Plastic Diaphragm Valves, ideal for solid plastic piping systems in sizes 1/2″ – 4″, are process proven in chemical and high purity applications. ITT Grinnell Replacement Diaphragms include material options diaphragm, types A Soft Natural Rubber (FDA), SA Soft Natural Rubber (FDA) straightway, B Black Butyl (FDA), SB Black Butyl (FDA) straightway, C Hypalon, E1 EPDM (FDA), M EPDM, SM EPDM straightway, P BUNA N (FDA), S Natural Rubber, SS Natural Rubber straightway, T Neoprene, ST Neoprene straightway, WB White Butyl (FDA), DP BUNA N Direct Loaded (FDA), V Viton, R2 PTFE (FDA), and TM PTFE (FDA) in sizes 1/2″ thru 12”. 

Features and Benefits

• Body Materials: Available in PVC (polyvinyl chloride), CPVC (chlorinated polyvinyl chloride), PP (polypropylene), and unpigmented PVDF (polyvinylidene fluoride). • Diaphragm Materials: Identical to the Dia-Flo Weir Diaphragm Valve offering, elastomeric and PTFE (polymerized tetrafluoroethylene) diaphragms are available to suit almost any process system. • Bonnet Materials: Two bonnets molded from glass reinforced polymers are available to provide the most economical and temperature-resistant solution. PP is the economical solution for line temperatures up to 200ºF (93ºC). For higher line temperatures up to 275ºF (135ºC), the thermoplastic material, PAS (polyarylsulfone) is recommended. • End Connections: Available in flanged, threaded, socket, and spigot weld end connections. Flanged end connections are compliant with ANSI 150# dimensions. Threaded end connections are compliant with NPT (National Pipe Thread) standards. Socket weld end connections are schedule 80. PVC and CPVC spigot weld end connections are schedule 80. PP and PVDF spigot weld end connections meet DIN SDR 11 dimensions. • Increased Flange Strength: PP and PVDF bodies feature PVDF-coated steel flanges for increased mechanical strength and sealing properties. This is especially advantageous in fiberglass-reinforced plastic piping systems and thermocycling services. • Actuation: The solid plastic Advantage® Actuator and standard Dia-Flo actuator are both available with the solid plastic diaphragm valve. The Advantage Actuator provides a lightweight, compact, durable solution. The 1/2″ – 2″ actuator is molded from a high-strength, glass-reinforced thermoplastic polymer, PAS (polyarylsulfone) capable of maximum line temperatures up to 275ºF (135ºC). In sizes, 3″ – 4″, the actuator is molded from a vinyl ester thermoset plastic capable of maximum line temperatures up to 275ºF (135ºC). Pneumatically operated and diaphragm driven, the actuators are available in three modes of operation: Failed Closed (Reverse), Fail Open (Direct), and Double Acting. For details on the Dia-Flo Actuator, refer to pages 8 and 9. • Actuator Accessories: Adjustable travel stops, adjustable opening stops, manual overrides, limit switches, and positioners are available to meet your process needs. Limit switches, both mechanical and proximity, are available in designs compliant with NEMA (4, 4X, 7, 9) and NEC (Class I, Division 1 and 2). For control applications, the Advantage Actuator with Moore Products positioner is available in sizes 3/4″ through 4″. • Size: The Dia-Flo Solid Plastic Diaphragm Valve is available in sizes 1/2″- 4″. See page 15 for a specific material, end connection, and size availability.

DiaFlo Straightway Diaphragm Valve provides the following benefits: 

• Slurry Applications: Due to the streamlined fluid passage, the Dia-Flo Straightway Valve can handle slurries, without solid particles becoming entrapped in cavities or crevices which may obstruct the operation of other valve types. In addition, the unobstructed flow path allows the valve to be rodded through. • Abrasion Resistant: Available in five rubber linings: Soft Rubber, Hard Rubber, Neoprene®, Hypalon®, and Butyl, the Straightway Valve is well suited to handling corrosive and abrasive services. • Corrosive Resistant: In addition to the rubber linings, Tefzel® ETFE, polypropylene, and glass linings are available to handle the most corrosive services. To protect the valve exterior, PVDF and white epoxy coatings are available. • Conventional Straightway Design: The Dia-Flo Straightway Valve is a conventional design as opposed to a reduced port straightway design. A reduced port straightway design is similar to a pre-pinched pinch valve, in that the flow path cross-sectional area is generally reduced. The reduction in area results in reduced flow capacity (Cv), increased velocity, increased pressure drop, and accelerated wear through the valve. • Bonnet Isolation: Similar to the weir valve, the working parts of the bonnet are completely isolated from the process media. Thus, in slurry or corrosive applications, the media can not adversely affect the operation of the valve internals, by either clogging or corroding them. • Bubble-Tight Shut-Off: 100% seat and shell testing is performed on every assembly to verify bubble-tight shut-off. Testing is performed in accordance with MSS SP-88 (Manufacturers Standardization Society of the Valve and Fittings Industry, Inc., Standard Practice – Diaphragm Valves). • Valve Options: Adjustable travel stop, sealed bonnet, alternate materials, alternate coatings and chain wheel operated are options that can be specified with a manual valve. For valve automation refer to pages 8 and 9. • Sizes: Rubber-lined bodies are available in sizes 1″–12″. Metal flanged end bodies are available in 1/2″–12″. Plastic and glass-lined bodies are available in 1″– 8″. Screwed metal bodies are available in 1/2″–2″. Refer to page 18 for material details.

The Dia-Flo Actuator has been field-tested and proven to be durable and long-lasting. More than 20 years of service is not uncommon. 

Features and Benefits 

• Long Lasting: Pneumatically operated and diaphragm driven, the Dia-Flo actuator provides long service life with minimal maintenance. The actuator wear parts are limited to only the nylon-reinforced Buna N® diaphragm and Buna N® o-rings which require infrequent replacement. • 3 Modes of Operation: Fail Closed (spring-to-close, air-to-open), Fail Open (spring-to-open, air-to-close) and Double Acting (air-to open, air-to-close) models are available to accommodate almost any system design. Fail Closed, the most frequently ordered mode of operation, assures a bubble-tight shut-off in the case of supply air pressure loss. • 8 Available Sizes: The wide selection of sizes accommodates almost any combination of line pressure and supply pressure. Maximum supply pressure, either pneumatic or hydraulic is 85 psig (5.86 bar). For actuator sizing, refer to our Dia-Flo Technical Manual or contact your local distributor or Technical Sales Representative. • Maintenance: Maintenance of the Dia-Flo actuator is typically minimal, requiring only periodic lubrication and occasional diaphragm and o-ring replacement. • Corrosion Resistance: PVDF and white epoxy coatings are available to protect the actuator and valve assembly from hazardous environments. • Mechanical Accessories: Adjustable opening stops, adjustable travel stops, manual overrides, position indicators, and yoke mountings are available to meet your processing requirements. • Instrumentation: Limit switches, both mechanical and proximity, capable of meeting NEMA 4, 4X, 7, 9, 13, and NEC (National Electrical Code) Class I, Division 1 and 2 are available in a variety of choices to meet your system requirements. In addition, solenoids, air filter regulators, transducers, positioners, speed control valves, and snap-acting relays may also be factory mounted. ITT Grinnell Replacement Diaphragms include material options diaphragm, types A Soft Natural Rubber (FDA), SA Soft Natural Rubber (FDA) straightway, B Black Butyl (FDA), SB Black Butyl (FDA) straightway, C Hypalon, E1 EPDM (FDA), M EPDM, SM EPDM straightway, P BUNA N (FDA), S Natural Rubber, SS Natural Rubber straightway, T Neoprene, ST Neoprene straightway, WB White Butyl (FDA), DP BUNA N Direct Loaded (FDA), V Viton, R2 PTFE (FDA), and TM PTFE (FDA) in sizes 1/2″ thru 12”. Contact us for product details and an offer by submitting an RFQ form.

The Dualrange Control Valve combines the standard features of the weir diaphragm valve with increased rangeability. Utilizing a unique two-piece compressor design, the Dualrange Control Valve has greater rangeability and controllability than typical diaphragm valves. Notable applications and benefits are as follows: 

Features and Benefits

• Control: The unique bonnet design encompasses two nested compressors as opposed to one utilized in conventional diaphragm valves. The individual movement of each compressor allows an increase in rangeability over conventional diaphragm valves. When an increase in flow is desired, the inner compressor moves completely upward, followed by the outer compressor. This dual movement allows greater variance in the flow path cross-sectional area, which directly corresponds to greater variances inflow. Hence increased controllability is achieved. • Cleanability: The streamlined flow path allows the control of high purity services while still maintaining stringent cleanliness requirements. • Slurries and Abrasives: Given the relative absence of cavities and crevices, the Dualrange Control Valve is ideal for controlling slurries up to 15% in solid concentration. • Positioners: The ITT Conoflow and Moore Products positioners are available as standard with the Dualrange Control Valve. Other positioners are available upon request. • Maintenance: The Dualrange utilizes standard Dia-Flo actuators and weir diaphragms. Therefore, part interchangeability and maintenance are standardized. Typically, only periodic lubrication and diaphragm and o-ring replacement are required. • Control Valve Sizing: To optimize the desired control within your system parameters, please contact us to perform sizing calculations and offer valve recommendations. • Sizes: The Dual range is available with all weir style bodies and diaphragms in sizes 1″ – 6″. Contact us for product details and an offer by submitting an RFQ form.

Dia Flo Diaphragms – The diaphragm material and design are integral to the successful performance of the diaphragm valve. For that reason, 12 weir elastomer diaphragms, two weirs PTFE diaphragms, and six elastomer straightway diaphragms are available to handle a multitude of process fluids and parameters. Our elastomer diaphragms are available in a variety of materials to address various process characteristics. Some elastomer diaphragms are softer and better suited to abrasive and slurry applications. Others are harder, providing greater chemical resistivity and higher temperature limitations. All elastomer diaphragms in sizes 1″ – 8″ are molded in the closed position to provide the most effective seal. Each diaphragm contains markings identifying the size, material, mold date, and valve supplier. To ensure the best possible diaphragm, ITT Engineered Valves maintains a continuing development program to utilize new materials and improve existing compounds. The result of this effort is the recent introduction of the PTFE grade TM diaphragm. 

• Proven benefits of the PTFE grade TM diaphragm versus conventional PTFE diaphragms are: — Reduced permeation due to a more homogeneous microstructure with minimal voids — Reduced cold flow similar to 25% carbon-reinforced PTFE — Increased cycle life due to a more amorphous compound • The molded closed design increases the sealing properties of the diaphragm. The relaxed position of the diaphragm is contoured to the same shape as the weir which increases the ability of the diaphragm to provide a bubble-tight shut-off. • The 2-piece design includes an EPDM elastomer backing cushion and a PTFE diaphragm. This design eliminates the common problems inherent to laminated PTFE diaphragms, such as delamination, permeation, and cracking. • The floating tube nut design shown on this page prevents point loading of the PTFE diaphragms which can cause downstream leakage and premature diaphragm failure. The downward force of the stem is transferred to the compressor bypassing the tube nut. Thus, the forces are evenly distributed over the seating area of the PTFE diaphragm reducing cold flow and stud pull-out problems. This same design is used on elastomer diaphragms 6″ and larger. ITT Grinnell Replacement Diaphragms include material options diaphragm, types A Soft Natural Rubber (FDA), SA Soft Natural Rubber (FDA) straightway, B Black Butyl (FDA), SB Black Butyl (FDA) straightway, C Hypalon, E1 EPDM (FDA), M EPDM, SM EPDM straightway, P BUNA N (FDA), S Natural Rubber, SS Natural Rubber straightway, T Neoprene, ST Neoprene straightway, WB White Butyl (FDA), DP BUNA N Direct Loaded (FDA), V Viton, R2 PTFE (FDA), and TM PTFE (FDA) in sizes 1/2″ thru 12”. Contact us for product details and an offer by submitting an RFQ form.

How to Specify or Order an ITT Replacement Diaphragm

To order please select the valve type, valve size, pressure class, body material, and end connections. Include options like by-passes. If no figure number is known, specify the details of operating conditions as a starting point for specifying a valve. Also, what functions do you wish the valve to perform? For air motor sizing choose one of the three basic types. Include pneumatic factors for instrument air, line media pressure, and any additional relevant details or options. Contact us for product details and an offer by submitting an RFQ form.

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