Pump Volute

A single-volute casing maintains a constant velocity and uniform pressure around the impeller only at BEP.

It is understandable that such a concept has been adopted because the volute has an increasing flow area as it wraps around the impeller, similar to a diffuser, but it is not the purpose of the volute to be a diffuser. Its function—when the pump is operating at the best efficiency point (BEP)—is to keep the velocity constant around the impeller so that mixing losses are minimized. To achieve that function, the area increases so as to accept the additional flow exiting the impeller, which exits the impeller all around the outside diameter (OD)—360 degrees. The pressure surrounding the impeller is uniform, resulting in zero hydraulic radial thrust on the impeller. 

Performance with Restricted Flow

When the flow from the pump is restricted, forcing the pump to operate at a reduced capacity, the flow from the impeller is reduced, and the volute does act as a diffuser, creating an increasing pressure from the cutwater all the way around to the casing throat. The maximum pressure rise occurs at shut-off (zero flow). 

Description:

Cast iron pump part, pump body

Material:

Grey iron ASTM A48 class30

Weight:

107kgs

Application:

Pump & Valves/Municipal Water Supply/Agricultural irrigation/Petroleum/Chemical/Mining Industry

Keywords:

Pump body/Pump part/Submersible pump parts/Sand casting/

Place of Origin:

Hebei, China

Brand Name:

OEM

Process:

green Sand Casting +Machining+Painting

Heat Treatment:

No

Machining :

CNC+Drilling Machine

Procedures:

1. Incoming material inspection 2.Charge mixture 3.Moulding 4.Melting&Pouring 5.Shot blasting&grinding 6.Painting 7.Visual test 8.Machining 9.Process inspection 10.Cleaning 11.Leakage test 12.FQC 13.Packing&stocking 14.Pre-shipment inspection 15.Delivery

Tolerance:

+/-0.05mm（ or according to the customers drawing indicated）

Packing:

Seaworthy Wooden Cases

Inspection:

MT/UT/RT/100% Visual+100%gauge/CMM

Standard:

ASTM. AISI. DIN. BS. JIS. NF. AS.

Certification:

ISO9001/TS16949/ISO14001

Supply Ability:

1000 Ton/Tons per Month

Port:

TIANJIN XIN'GANG

Drawing:

Provide by customer, or design according as the sample,in the format of Pro/E, Auto-CAD, SOLIDWORK, CAXA, UG, CAD, CAM, CAE, STP, IGES, etc.

Mould :

Design and produced by ourselves according to provided drawings

FAQs

1. How can I get the quotation? 

Please send us your drawing together with the weight,material and quantity requireed.

2. If we don't have the drawing,can you make drawing for me? 

Yes, we can scan your sample and make the drawing for your confirmation. 

3. What kind of file format you can read?

PDF, IGS, DWG, STEP, etc. 

4. How small and how big you can cast?

1kg~2000kg

5. What is the MOQ? 

1pc

6. What is the sample and order lead time? 

Sample time: 6-8 weeks including tooling construction. Order time: 4-6 weeks after sample approval, it can be flexible due to complexity or quantity.

7. What is your payment terms? 

L/C，D/P， T/T are accepted.

Tooling:100% in advance, Order:50% deposit, 50% before shipment.

8. What kind of patterns do you always construct and use? 

We always cast make and cast with aluminum patterns.