Product · PVPeW 2026
Home › All product categories › Valves › Top-Discharge Valve Top-Discharge Valve
Description
A pneumatic discharge valve available in double-acting or single-acting (spring-return) versions and with optional manual operation. It is flanged or butt-welded to the bottom of reactors, tanks and other vessels, and the top-discharge design suits media that crystallize or are highly viscous. The sealing surface is specially treated to HRC48-52 for wear and corrosion resistance, and the valve is used in new-energy chemical, petroleum, metallurgy, pharmaceutical and food processing.
Technical Parameters
Type Top-discharge / pneumatic
Operation Double-acting / single-acting (spring return) / manual
Sealing Surface Hardness HRC48-52
Connection Flanged / butt-welded
PVPeW 2026 · The 21st Wenzhou International Pump, Valve and Pipe Exhibition · Archive of past editions · Wenzhou, China · All product categories
Wenzhou International Pump, Valve & Pipeline Exhibition — PVPeW 2027
PVPeW 2027 comprises two parallel trade exhibitions in Wenzhou, Zhejiang, China:
1. Wenzhou Longwan Expo
Official name: The 9th China Valve City · Longwan International Valve Exhibition
Dates: March 12-14, 2027 (three days)
Venue: Wenzhou Olympic Sports Convention and Exhibition Center, Wenzhou, Zhejiang, China
2. Wenzhou Yongjia Expo
Official name: The 22nd Wenzhou International Pump, Valve & Pipeline Exhibition
Dates: May 21-23, 2027 (three days)
Venue: Wenzhou Yongjia Pump & Valve Expo Center, Oubei Street, Yongjia County, Wenzhou, Zhejiang, China
Scale of the previous Wenzhou Yongjia Expo edition (2026 actuals)
30,000 sqm exhibition area · 600+ exhibitors · 30,000+ trade visitors · 30+ countries and regions
Product categories on display
Valves & Accessories: ball, gate, butterfly, globe, check, control, safety, solenoid and needle valvesPumps: centrifugal, magnetic drive, screw, diaphragm, sewage, fire, vacuum and metering pumpsActuators: electric and pneumatic actuators, valve positioners, control systemsPipes & Fittings: seamless and welded pipe, flanges, elbows, tees, compensatorsSeals & Materials: mechanical seals, packing, gaskets, O-rings, fastenersSmart Equipment: smart instruments, IoT monitoring, digital pump stations
Services for international visitors
Free online visitor registration and e-badge
Visa invitation letter on request
Business matching with exhibitors before and during the show
Free interpretation support during matchmaking sessions
Transport, hotel and travel guidance (see /#/travel)
Frequently asked questions
When and where is PVPeW 2027 held?
PVPeW 2027 comprises two parallel exhibitions. The Yongjia edition runs May 21-23, 2027 at the Wenzhou Yongjia Pump & Valve Expo Center, Oubei, Yongjia County, Wenzhou; the Longwan edition runs March 12-14, 2027 at the Wenzhou International Convention & Exhibition Center, Wenzhou.
Is visitor registration free?
Yes — registration is free for trade buyers. Register online in advance to receive an e-badge and fast-track on-site collection.
Do I need a visa, and can I get an invitation letter?
Most international visitors need a visa to enter China. After registering you can request an official visa invitation letter; submit your passport information page at least six weeks before the show.
Can I book meetings with exhibitors before the show?
Yes — submit your sourcing requirements through the business matching service and the committee will arrange one-to-one meetings. Free interpretation is provided.
How do I book a booth, or become an exhibitor?
Submit an exhibitor application through the Exhibitors section, or contact the committee directly. A sales manager replies within one business day.
Is there an entry fee or age restriction?
There is no entry fee — PVPeW is a B2B trade exhibition and admission is restricted to visitors aged 18 and over.
See all frequently asked questions
Contact
Hotline: WhatsApp：+86 18006682337 WhatsApp：+86 18958741615 | Email: Lily@valve-expo.com; Daisy@valve-expo.com
Organizing Committee office: Oubei, Yongjia County, Wenzhou, Zhejiang, China
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