All You Need to Know About ProPortâ„¢ Casings

Viking Pump's latest internal gear pump series (models H-QS in steel and stainless steel) introduces a variety of advantages over their previous alloy counterparts, especially in terms of porting flexibility. These new pumps have reduced the number of casing configurations, simplifying manufacturing processes, lowering costs, and shortening lead times, while simultaneously expanding porting options and offering greater flexibility.

Users informed us that they wanted smaller ports for low viscosity liquids to cut piping expenses, or larger ports for high viscosity fluids to reduce friction losses and energy consumption. Consequently, a single pump size had to support multiple port sizes and meet various global standards and pressure/temperature specifications.

Previously, Viking Pump produced numerous casing configurations because the ports were integrally cast into the casing, meaning every pump size required unique casings for each port size, standard, and rating option. This resulted in an overwhelming number of casings to cover all global needs.

The Viking Pump ProPortâ„¢ Casing

One of the key innovations leading to the new ProPortâ„¢ casings is the adoption of bolt-on rather than cast-in ports. This change has drastically reduced the number of unique casings from 372 to just 14. To put this into perspective, imagine moving from hundreds of distinct casings down to a manageable number. This shift allows distributors to stock a range of sizes and quickly modify ports to fit their clients' unique piping setups.

Reduced complexity with ProPortâ„¢ casings

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

Port Options (Inches)	Pump Sizes
Port Options (Inches)	H	HL	K	KK	L	LL	LS	Q	QS
1.5" NPT	S	S	Â	Â	Â	Â	Â	Â	Â
2" NPT	Â	Â	âœ”	âœ”	âœ”	Â	Â	Â	Â
1.5" Class 150 â‘	âœ” â“‡	âœ” â“‡	Â	Â	Â	Â	Â	Â	Â
1.5" Class 300 â‘¡	âœ” â“‡	âœ” â“‡	Â	Â	Â	Â	Â	Â	Â
2" Class 150 â‘	âœ”	âœ”	S â“‡	S â“‡	Â	Â	Â	Â	Â
2" Class 300 â‘¡	âœ”	âœ”	âœ” â“‡	âœ” â“‡	Â	Â	Â	Â	Â
2.5" Class 150 â‘	Â	Â	âœ” â“‡	âœ” â“‡	S â“‡	Â	Â	Â	Â
2.5" Class 300 â‘¡	Â	Â	âœ” â“‡	âœ” â“‡	âœ” â“‡	Â	Â	Â	Â
3" Class 150 â‘	Â	Â	âœ”	âœ”	âœ” â“‡	S â“‡	S â“‡	Â	Â
3" Class 300 â‘¡	Â	Â	âœ”	âœ”	âœ”	âœ” â“‡	âœ” â“‡	Â	Â
4" Class 150 â‘	Â	Â	âœ” â“‡	âœ” â“‡	âœ”	âœ”	âœ”	S â“‡	Â
4" Class 300 â‘¡	Â	Â	Â	Â	âœ”	âœ”	âœ”	âœ” â“‡	Â
6" Class 150 â‘	Â	Â	Â	Â	Â	Â	Â	âœ”	S â“‡
6" Class 300 â‘¡	Â	Â	Â	Â	Â	Â	Â	âœ”	âœ” â“‡
DIN 32 PN16 *	âœ” â“‡	âœ” â“‡	Â	Â	Â	Â	Â	Â	Â
DIN 40 PN16 *	âœ”	âœ”	Â	Â	Â	Â	Â	Â	Â
DIN 50 PN16 *	âœ”	âœ”	âœ” â“‡	âœ” â“‡	Â	Â	Â	Â	Â
DIN 65 PN16 *	Â	Â	âœ”	âœ”	âœ”	âœ” â“‡	Â	Â	Â
DIN 80 PN16 *	Â	Â	âœ”	âœ”	âœ”	âœ” â“‡	âœ” â“‡	Â	Â
DIN 100 PN16 *	Â	Â	Â	Â	âœ”	âœ”	âœ”	âœ” â“‡	âœ” â“‡
DIN 150 PN16 *	Â	Â	Â	Â	Â	Â	Â	âœ”	âœ” â“‡

âœ”= Available Port Option
S = Standard Porting
â“‡ = 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 benefits of increased flexibility, reduced lead times, and lower costs, there are several other reasons to consider switching to the Modular pumpsâ€™ ProPortâ„¢ 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 necessary to remove an NPT-ported pump.
Since all ports can be reused, ordering a replacement pump with fewer ports can further reduce costs.
Bolt-on ports can be sealed with gaskets or O-rings and were designed and tested to exceed nozzle load ratings according to 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 discharge ports to keep piping costs low.

Viking pumps are renowned for their 90â° ports, typically configured for side suction and top discharge to pump to overhead lines. However, some customers expressed interest in more opposite port options. While some opposite port models were available, they often came with longer lead times and higher costs. Surprisingly, in reducing the number of casings from 372 to 14, Viking Pump managed to add opposite port models across all sizes, from H to QS (with capacities ranging from 30 to 500 gallons per minute or 3.5 to 114 cubic meters per hour). Thatâ€™s a 26-fold reduction in casings, with more customer-focused options! Moreover, these new casings are fully retrofittable onto existing Viking pumps.

Fig. 2 - HL 227C with opposite Ports

More Features in Every Casing

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