All You Need to Know About ProPortâ„¢ Casings

Viking Pump's latest generation of internal gear pumps (models H-QS in steel and stainless steel) brings numerous advantages over the older alloy versions, particularly in terms of porting flexibility. By reducing the number of casing configurations, these new pumps simplify production processes, lower costs, and shorten delivery times, while simultaneously expanding porting options and enhancing porting flexibility.

 

Due to the broad range of viscosities that Viking pumps can handle, users expressed a desire for smaller ports on low-viscosity liquids to cut piping expenses, or larger ports for high-viscosity liquids to reduce friction losses and energy consumption. This meant that a single pump size had to offer multiple port sizes and comply with various global standards and pressure/temperature ratings.

One of the main reasons for the numerous casing configurations in the past was that the ports were integrally cast into the casing. This resulted in unique casings for each port size and standard/rating option for every pump size, leading to an overwhelming variety of casings to meet every global requirement.

The Viking Pump ProPortâ„¢ Casing

One of the key changes contributing to the development of the new ProPortâ„¢ casings is the switch to bolt-on rather than cast-in ports. This change reduced the number of unique casings from 372 to just 14. To emphasize this dramatic reduction: from 372 unique casings down to 14. This allows distributors to stock a variety of sizes and quickly modify ports to fit their customers' specific piping arrangements.

327 unique casings to 14 unique casings. less complexity for our distributors means faster and more flexible solutions for customers

For instance, the new K and KK size pumps offer bolt-on 2” NPT ports; ANSI-compatible Class 150 raised-face flanges in 2”, 2-1/2”, 3” and 4” sizes; Class 300 in 2”, 2-1/2” and 3” sizes; as well as DIN 50, 65 and 80 PN16 ports. Now, instead of numerous casings, one casing, used on both K and KK sizes, offers 11 bolt-on port options, with internal porting sized to accommodate the largest available port. See the table below for available ports.

 

 

Port Options (Inches) Pump Sizes
H HL K KK L LL LS Q QS
1.5" NPT S S              
2" NPT     ✔ ✔ ✔        
1.5" Class 150 ① ✔ Ⓡ ✔ Ⓡ              
1.5"   Class 300 ② ✔ Ⓡ ✔ Ⓡ              
2" Class   150 ① ✔ ✔ S Ⓡ S Ⓡ          
2" Class   300 ② ✔ ✔ ✔ Ⓡ ✔ Ⓡ          
2.5"   Class 150 ①     ✔ Ⓡ ✔ Ⓡ S Ⓡ        
2.5"   Class 300 ②     ✔ Ⓡ ✔ Ⓡ ✔ Ⓡ        
3" Class   150 ①     ✔ ✔ ✔ Ⓡ S Ⓡ S Ⓡ    
3" Class   300 ②     ✔ ✔ ✔ ✔ Ⓡ ✔ Ⓡ    
4" Class   150 ①     ✔ Ⓡ ✔ Ⓡ ✔ ✔ ✔ S Ⓡ  
4" Class   300 ②         ✔ ✔ ✔ ✔ Ⓡ  
6" Class   150 ①               ✔ S Ⓡ
6" Class   300 ②               ✔ ✔ Ⓡ
DIN 32 PN16 * ✔ Ⓡ ✔ Ⓡ              
DIN 40 PN16 * ✔ ✔              
DIN 50 PN16 * ✔ ✔ ✔ Ⓡ ✔ Ⓡ          
DIN 65 PN16 *     ✔ ✔ ✔ ✔ Ⓡ      
DIN 80 PN16 *     ✔ ✔ ✔ ✔ Ⓡ ✔ Ⓡ    
DIN 100 PN16 *         ✔ ✔ ✔ ✔ Ⓡ ✔ Ⓡ
DIN 150 PN16 *               ✔ ✔ Ⓡ

✔= Available Port Option
S = Standard Porting
Ⓡ = Flanges designed with a Raised Face
â‘  = Ports are suitable for use with Class 150 steel or stainless steel companion flanges or flanged fittings
â‘¡ = Ports are suitable for use with Class 300 steel or stainless steel companion flanges or flanged fittings
* Ports are suitable for use with DIN PN16 steel or stainless steel companion flanges or flanged fittings

Fig. 1 - Port Options for ProPortâ„¢ Casings

 

Key Benefits of ProPortâ„¢ Casings

In addition to the flexibility, lead time and price reduction benefits, here are some additional reasons for switching to the Modular pumps’ ProPort™ Casings:

 

  • The removable NPT threaded ports on H-L size pumps eliminate the need for unions in the suction and discharge lines that were previously required to remove an NPT-ported pump. 
  • Since all ports can be re-used, if a replacement pump is needed, it can be ordered with fewer ports to further reduce cost.
  • The bolt-on ports can be sealed by gaskets or O-rings, and were designed and tested to ensure nozzle load ratings exceed ASME, DIN and other global standards.
  • Your distributor can provide enlarged suction ports to minimize friction losses that decrease NPSHa and can cause cavitation, while using smaller sized discharge ports to keep piping costs low.

 

Viking pumps are renowned for their 90° ports, typically allowing side suction and top discharge piping to pump to overhead lines. However, some customers expressed a desire for more opposite port options, and while some opposite port models were available, they often came with longer lead times and higher prices. Surprisingly, in reducing the number of casings from 372 to 14, Viking Pump actually introduced opposite port models in all sizes, from H through QS (with capacities ranging from 30 to 500 gallons per minute or 3.5 to 114 cubic meters per hour). That’s 26 times fewer casings, with more customer-focused options! Moreover, the new casings are fully retrofittable onto existing Viking pumps.

Hl 227C with opposite ports
Fig. 2 - HL 227C with opposite Ports

More Features in Every Casing

Initially, Viking Pump’s alloy pumps employed gaskets to seal the bracket and head to the casing, as gaskets were compatible with nearly every liquid and simplified product selection. However, some customers preferred O-ring seals, which necessitated machining special grooves at higher cost and longer lead times. The new ProPort™ casings are gasketed but also come with O-ring grooves as standard, enabling static O-ring seals if required.

 

gif of casing showing gasket and o-ring seal optionsNear Field Shielding Material

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