The document summarizes Primeroyal metering pumps from Milton Roy. It describes how the pumps are designed with modular frames and liquid ends to meet a variety of application needs. Key features highlighted include variable eccentric gear mechanisms for precise flow control, multiple liquid end options for different pressure and chemical requirements, and modular configurations that allow for simplex, duplex or triplex pump arrangements. The document also lists typical industries and chemicals the pumps are used for.

2. Since 1936, Milton Roy pumps have been valued by customers
for their durability and dependability in critical chemical dosing
applications. Primeroyal continues that tradition with a variety of
frames and configurations that fit the needs of the most demanding
processes.
The Primeroyal series foundation is based on a robust gear
mechanism and a modular design that accepts several styles of
liquid ends and capacity control options. This means every pump
is tuned to the specific needs of its application. The use of solid
engineering principles assures that even the smallest detail of
the design is focused on providing continuous operation with the
longest possible time between scheduled maintenance. The final
product is a trustworthy metering pump that is an integral part of
your process.
PRIMEROYAL®
Controlled Volume Metering Pumps
• Built to API 675 standards
• 4 frame sizes
• Multiplexable in any combination of frame sizes
• Variable eccentric gear mechanism for maximum
performance in the smallest available footprint.
• Variable stroke length or fixed stroke length available
• Capacity adjustable while running or stopped
• Multiple standard liquid end configurations available
• High performance diaphragm (HPD) for
pressures up to 3,500 psi (240 Bar)
• Critical service high pressure disc diaphragm
• Metallic diaphragms for pressures up to
30,000 psi (2069 Bar)
• Packed Plunger for pressures up to
20,000 psi (1380 Bar)
• Special liquid end configurations available for
specific needs
• Standard liquid end materials include:
• 316ss
• PVC
• Alloy 20
• Optional materials such as Alloy C22, titanium,
PVDF, etc. available.
• Various mount options for NEMA and IEC flange
mounted motors
• Unique designs easily accommodated
General Specifications
1

3. PrimeRoyal®
Capacity and Pressure Ratings
The Primeroyal®
variable eccentric drive enables
precisecontrolofthepumpdeliveryratewhilemeetingor
exceeding industry standards for steady state accuracy
and repeatability. The design provides this high level of
performance within a small space, so Primeroyal®
can fit into tight spaces.
The variable eccentric mechanism changes the stroke
length by changing the position of the center of the
shaft in the eccentric.To understand this better, assume
the setting is at 0%. At 0%, the shaft is dead center of
the eccentric and does not transfer any motion to the
plunger. By increasing the capacity setting, the center
point of the shaft moves from the center point of the
mechanism and stroke length gradually increases until
the setting is at 100%.
The Primeroyal®
variable eccentric is a non lost
motion design as compared to designs that have stop
plates or rods to limit the plunger travel. These lost
motion units also rely on spring return mechanisms
to keep the plunger in contact with the eccentric.
The Primeroyal®
powers the full stroke cycle thus
avoiding the mechanical and hydraulic shocks inherent
in lost motion drives.
In critical processes,the variable eccentric drive assures
both durability and optimum performance for the entire
chemical dosing system.
Variable Eccentric Drive Design
PrimeRoyal®
complete control
2

4. PrimeRoyal®
Standard Liquid Ends
Milton Roy’s HPD liquid end has proven its value to
customers for decades. It combines the best
characteristics of traditional liquid ends into a simple
but elegant design.
• Hydraulically balanced diaphragm minimizes
stress and assures long diaphragm life.
• Diaphragm PTFE wetted surface provides wide
application coverage while composite materials
allow maximum flexibility
• Patented diaphragm design is reusable after
pump disassembly
• 3 psia net positive inlet pressure required
• Adjustable internal relief valve in hydraulic system protects pump from overpressure
• Patented MARS hydraulic fluid compensation system eliminates the need for process side diaphragm containment
that restricts flow
• Diaphragm design life of 49,000 hours continuous duty
• Handles pressures up to 3,500 psi (240 Bar) without impact on diaphragm life
• Optional materials handle temperatures up to 300° F
Packed Plunger
The packed plunger liquid end offers the best performance
when net positive inlet pressure (NPIP) is an issue.
The plunger is in direct contact with the process fluid
creating the most efficient pumping performance.
• Excellent for viscous fluids and slurries
• 1 psia net positive inlet pressure required
• Options available to handle temperatures as
high as 600° F
• Pressures up to 20,000 psi (1380 Bar)
• Standard ceramic plungers provide long plunger life
HPD – High Performance Diaphragm
Discharge Ball
Check Valve
Grease Fitting
Packing
Lantern Ring
Process Fluid
Suction Ball
Check Valve
Piston
3

5. Milton Roy’s CSD liquid end is specifically engineered
for demanding applications, and incorporates all the
features required to assure optimum performance in
high end processes. The CSD liquid end is designed
to allow customization for specific applications. This
assures that the pump is always tuned to the needs of
the process.
• Pressures up to 5,000 psi (345 Bar)
• Hydraulically balanced diaphragm minimizes
stress and assures long diaphragm life
• 3 psia net positive inlet pressure required
• Patented MARS hydraulic fluid compensation
system eliminates need for process side
diaphragm containment that restricts flow
• Each pump is specifically configured for each
process according to flow, pressure, process fluid
compatibility
Discharge Ball
Check Valve
Displacement
Chamber
Plunger Sleeve
Diaphragm Head
Diaphragm Head
Bolts/Nuts
Disc Diaphragm
Milton Roy’s metallic diaphragm liquid end handles the most
severe high pressure applications with ease. Each pump is
carefully configured for its specific application, assuring long
term success, reliability, and efficiency.
• High pressure applications up to 30,000 psi (2065 Bar)
• Hydraulically balanced diaphragm minimizes stress
• Standard diaphragm material 301 full hard stainless
steel – modified materials available to suit the process
fluid
• Sealless liquid end design assures leak free operation
CSD - Critical Service Diaphragm Metallic Diaphragm
Plunger
Process Fluid
Hydraulic Fluid
4
Suction Ball
Check Valve

6. PrimeRoyal®
Modular Flexiblity
PrimeRoyal R Triplex with
CSD critical service liquid end
PrimeRoyal L Duplex
with Metallic Diaphragm
liquid end and diaphragm
rupture detection
PrimeRoyal L Triplex with CSD
critical service liquid end
PrimeRoyal L Simplex with HPD liquid end
PrimeRoyal R Simplex with
Metallic Diaphragm liquid end,
diaphragm rupture detection and
electronic capacity control
5

7. The PrimeRoyal series offers the options needed to meet the requirements most applications.
• Electronic Capacity Control
• Variable speed drives
• Flanged, NPT, and other connections as required
• Liquid end materials
• 316 ss
• Alloy 20
• Alloy C
• PVC
• PVDF
• Others as required
• Multiplex configurations of same frame or mixed model
PrimeRoyal®
Options
• Manifold piping for multiplex units
• Special base plates
• Diaphragm Rupture Detection system
• Steam or cooling jackets
• Remote head
• Slurry or viscous fluid check valves
• Packing lubrication systems
• High temperature configurations
• Low temperature options
• NEMA and IEC flange motor mount options
PrimeRoyal®
Typical Industries and Applications
6
PrimeRoyal Metering Pumps are used in a wide range of Industries and applications. The following are partial lists:
Industries
Additives and Sealants
Biofuels
Chemical Processing
Cleaning and Detergents
Electronics
Energy and Power Generation
Food and Beverage
Typical Application Chemicals
Acetic Acid
Amines
Ammonia
Antifoam
Benzine
Biocide
Butane
Catalyst
Caustic
CO2 (Carbon Dioxide)
Coagulants
Condensate
Corrosion Inhibitor
Demulsifier
Diesel
Dimethyl Ether
DMAC (Dimethylacetamide)
DMDS (Dimethyl Disulfide)
Drag Reducer
Industrial Processes
Mining and Minerals
Municipal Water and Waste
Oil and Gas
Paint, Ink, and Coatings
Personal Care
Pharmaceutical
Plastics and Rubber
Plating
Pulp and Paper
Refining
Supercritical Fluid Processes
Textiles
General Industrial Water and Waste Treatment
Emulsion Breakers
Ethanol
Flocculants
Fuel Additives
Glycol
H2S Scavengers
H2SO4
HCL
HCL Anhydrous
Hydrate Inhibitors
Hydrazine
Hydrogen Peroxide
Isobutane
MEG
Methanol
Molten Sulphur
NAOH
Oxygen Scavengers
Pentane
Phosphate
Polymers
Propane
Propane
Scale Inhibitors
SiHCL (Trichlorosilane)
Silicone Oil
Sodium Hypochlorite
Sodium Methoxide
Sodium Phosphate
Stearic Acid
TEA (Triethaonlamine)
Trisodium Phosphate
Water
Water - Deionized
Water - Demineralized
Water (Supercritical)
Wax or Parafin Inhibitors
Xylene

8. MILTON ROY
201 Ivyland Road • Ivyland, PA 18974 • tel 215.441.0800 • fax 215.441.8620
www.miltonroy.com • info@miltonroy.com
Brochure #49753 Rev 3/2013