Key Components:
Pump bodies, pump covers, impellers, guide vanes, suction sections, discharge sections, and pressure-bearing or wetted parts for ball valves, gate valves, globe valves, check valves, and butterfly valves, including valve bodies, bonnets, seats, and brackets; individual part weights range from 0.1 kg to 80 kg.
Precision Casting Solutions for Pump & Valve Components
Pump and valve castings are core pressure-bearing components in fluid transport and control systems, widely used in oil and gas, petrochemical, power generation, water treatment, offshore equipment, metallurgy, and papermaking. These parts operate under pressure, corrosion, erosion, and high/low temperature cycling, requiring excellent internal soundness, dimensional accuracy, and surface quality.
We use low-temperature wax silica sol investment casting to produce pump and valve castings with complex structures, thin walls, and irregular flow passages. The castings have smooth surfaces and high dimensional accuracy, reducing downstream machining allowance and lowering total manufacturing cost.
Precision Forming: CT7 dimensional tolerance and Ra 6.3-12.5 surface roughness reduce machining allowance by 30%-50%.
Complete Material Range: Stainless steel, duplex steel, carbon steel, low-alloy steel, and heat-resistant alloys are available to meet ASTM, EN, JIS, and other standards.
Reliable Pressure Performance: 100% visual and dimensional inspection, with RT/UT/MT/PT and hydrostatic or air-tightness reports available on request.
One-Stop Delivery: Casting + heat treatment + machining + surface treatment are integrated to shorten the customer supply chain.
Complex Flow Passage Capability: Smooth internal passages and near-net-shape geometry help improve flow performance and reduce secondary processing.
The following are typical examples of pump and valve castings (8 items shown); other specifications can be customized based on customer drawings and equipment models:
| No. | Part Name | Common Materials | Process / Remarks |
|---|---|---|---|
| 1 | Ball Valve Body (Two-Piece / Three-Piece) | CF8 / CF8M / CF3M (ASTM A351) | Silica sol process, precision center port and flange |
| 2 | Gate Valve Body | WCB / WCC / LCC (ASTM A216/A352) | Pressure-bearing part, RT inspection available |
| 3 | Globe Valve Body | CF8M / CN7M / Duplex 2205 | For corrosive service, solution treatment |
| 4 | Check Valve Body / Disc | CF8M / 17-4PH / CD4MCu | Swing or lift type available |
| 5 | Pump Body (Volute) | CF8M / 316L / Duplex 2205 | Irregular thin wall, smooth flow passage |
| 6 | Impeller (Closed / Open) | CF8M / 316 / 17-4PH | Dynamic balancing, complete flow profile |
| 7 | Pump Cover / Valve Bonnet | WCB / CF8 / CF8M | Precision machining of sealing surfaces |
| 8 | Valve Seat / Bracket | WCB / 4130 / 304 | Can be supplied with valve body as a set |
- Chemical Composition: Each heat is analyzed by direct-reading spectrometer and controlled to ASTM/EN tolerances, with heat-number traceability.
- Mechanical Properties: Test bars are used for tensile, impact, and hardness testing to verify yield strength, tensile strength, elongation, and hardness.
- Non-Destructive Testing: RT (ASTM E446/E186), UT, MT (ASTM E709), and PT (ASTM E165) are available on request.
- Pressure Testing: Valve bodies can undergo hydrostatic testing at 1.5 times nominal pressure and 0.6 MPa air-tightness testing, with no leakage during holding.
- Surface Quality: 100% visual inspection is performed according to MSS SP-55 / ASTM A802 visual acceptance standards.
- Stainless steel ball valve body volume project for petrochemical use: CF8M material, DN25-DN200 series, annual supply over 50,000 pieces.
- Stainless steel pump casting sets for chemical process pumps: CF8M pump body + impeller + pump cover, supplied to European pump customers.
- LCC gate valve castings for low-temperature service: -46°C impact qualified, used in low-temperature water treatment and LNG applications.
- Recommended combinations: Valve body + bonnet + bracket sets; pump body + impeller + pump cover sets to reduce multi-supplier management costs.
- Custom pump and valve wetted parts can be supplied according to PDF/DWG/STEP drawings and customer material standards.
Frequently Asked Questions (FAQ)
We manufacture pressure-bearing and wetted castings according to customer drawings, material standards, testing levels, and end-use service conditions.
What is the minimum order quantity for pump and valve castings?
For regular materials, the MOQ is typically 100 pieces. For special materials or new product development, small trial orders from 50 pieces may be accepted depending on part weight and material.
Can you provide PED or CE support?
Production can follow PED 2014/68/EU requirements with material traceability and EN 10204 3.1 certificates. If CE marking is required, we can cooperate with third-party notified body review.
What is the typical lead time?
New sample tooling usually takes 15-25 working days, and batch orders are normally delivered 25-40 days after confirmation. Urgent orders can be discussed separately.
What surface treatments are available for valve bodies?
Pickling and passivation, sand blasting, shot blasting, electropolishing, and epoxy coating are available to meet corrosion resistance and appearance requirements.
Request a Pump & Valve Casting Solution and Quote
Please send your drawings (PDF/DWG/STEP), material, and quantity requirements; we will provide technical evaluation and quotation within 24 hours.