Home / All
Hydraulic Quick Release Couplings & Valves
57 results
ViewShowcase
This EH series is interchangeable with Parker 20 series, Parker 30 series, Hansen 1000 series, Hansen 3000 series, Rectus 23KA series, Rectus 24 series, Rectus 1400 series, Rectus 1423 series, CEJN 310 series, TEMA 1400 series, FOSTER 3/4/5/6 SERIES, GROMELLE 600 series, JWL 521 series, JWL 531 series, and Eaton 43 series pneumatic quick couplers.
Brass / Steel Product. This sleeve-type coupler accepts industrial interchange. It is widely used to connect air lines and low-pressure fluids. Its compact and economical design uses a ball locking mechanism consisting of captive steel balls that engage the locking groove on the mating nipple. The sliding spring-loaded sleeve on the coupler must be manually retracted to connect or disconnect the nipple. Common applications include compressed air, water, grease, paint, limited vacuum, and limited gases.
Brass / Steel Product. This sleeve-type coupler accepts industrial interchange. It is widely used to connect air lines and low-pressure fluids. Its compact and economical design uses a ball locking mechanism consisting of captive steel balls that engage the locking groove on the mating nipple. The sliding spring-loaded sleeve on the coupler must be manually retracted to connect or disconnect the nipple. Common applications include compressed air, water, grease, paint, limited vacuum, and limited gases.
Brass Product. Suitable for industrial, pneumatic, domestic, and hydraulic installations. Steam, gasoline, fuel, oils, gas-oil, kerosene, acids, compressed air, etc. Minimum and maximum working temperature: -15°C-120°C. Available from 1/4'' to 2'' body sizes.
This EH series is interchangeable with MHA RV SERIES, FASTER VU SERIES, STUCCHI VUZ SERIES, GROMELLE R4000 SERIES, GEMELS VU SERIES, and HOLMBURY CV SERIES. Steel Product. One-way check valve for in-line use. Suitable for any type of hydraulic system using liquid that is not highly viscous. The standard type is in zinc-plated carbon steel, and it is suitable for non-corrosive mineral-based oils and liquids.
This EH series is interchangeable with PISTER BKH SERIES, MHA BKH SERIES, HYDAC KHB SERIES, HYDAC KHM SERIES, GEMELS GE2 SERIES, CIOCCA CRHI2 SERIES, and HOLMBURY BVC2 SERIES. Steel Product. Two-way high-pressure ball valve (carbon steel), used in various industries including construction, agricultural machinery, water engineering, mining engineering, and paint industries.
This EH series is interchangeable with STUCCHI DP PLATE SERIES. Steel Product. The multicoupling series offers an efficient solution for simultaneous hydraulic line connections, featuring multiple configurable sets of 3/8" or 1/2" plugs and couplers operated via a steel handle for quick, secure engagement. Designed for demanding applications, all couplers are zinc-nickel plated for corrosion resistance and support connect-under-pressure functionality, ensuring reliable performance in high-pressure systems. The modular design allows individual coupler replacement after reaching their recommended service life.
This EH series is interchangeable with STUCCHI VEP-P SERIES, PARKER FET SERIES, FASTER FHV SERIES, DNP PST4 SERIES, VOSWINKEL FT SERIES, DIXON VEP SERIES, and HOLMBURY HFT SERIES. Steel Product. Engineered for demanding hydraulic systems, the 297 Series provides reliable performance in applications subject to extreme pressure impulses and residual line pressures. The innovative thread-to-connect design significantly reduces wear and prevents brinelling, while the internal valve technology enables safe connection and disconnection even under high residual pressure conditions.
This EH series is interchangeable with STUCCHI FL SERIES, CEJN X66 SERIES, PARKER FS SERIES, VOSWINKEL FH-VA SERIES, GROMELLE 629-Z SERIES, FASTER 2FFI Stainless Steel SERIES, DNP PLTX SERIES, and DIXON HT SERIES. Stainless Steel Product. Flat face couplings, with stainless steel (AISI 316) components and seals in Viton. High corrosion resistance. ISO 16028 interchange.
This EH series is interchangeable with PARKER 3000 SERIES, HANSEN WA56000 SERIES, SAFEWAY S30 SERIES, FASTER PVVM SERIES, STUCCHI IV-HP SERIES, DNP PVM SERIES, VOSWINKEL HJ SERIES, and DIXON T SERIES. Steel Product. Heavy-duty screw-on couplings engineered for extreme-pressure applications (bridge maintenance jacks, industrial hydraulics). Features a premium metal-to-metal poppet valve seal delivering industry-leading pressure performance. ISO 14540 compliant for guaranteed interchangeability.
This EH series is interchangeable with the DNP PAO1 SERIES. Steel Product. As the free-flow version of the 75 series, 72 couplings feature an open-passage design with no internal valves, ensuring higher flow efficiency and reduced pressure loss.
This EH series is interchangeable with RECTUS 26KA SERIES, RECTUS 25KA SERIES, TEMA 1600 SERIES, CEJN 320 SERIES, and DIXON CJ SERIES. Brass Product. This sleeve-type coupler accepts industrial interchange. It is widely used to connect air lines and low-pressure fluids. Its compact and economical design uses a ball locking mechanism consisting of captive steel balls that engage the locking groove on the mating nipple. The sliding spring-loaded sleeve on the coupler must be manually retracted to connect or disconnect the nipple. Common applications include compressed air, water, grease, paint, limited vacuum, and limited gases.
Brass Product. Suitable for industrial, pneumatic, domestic, and hydraulic installations. Steam, gasoline, fuel, oils, gas-oil, kerosene, acids, compressed air, etc. Minimum and maximum working temperature: -15°C-120°C. Available from 1/4'' to 1'' body sizes.
This EH series is interchangeable with MHA RV SERIES, PARKER 339 SERIES, and GROMELLE 654-Z SERIES. Stainless Steel Product. One-way stainless steel 316 check valve for in-line use. Suitable for any type of hydraulic applications. This series check valve allows flow in one direction and blocks it in the opposite direction. The flow is only allowed once a pre-set cracking pressure is reached. Customized cracking pressure is available. This series is widely used in corrosive environments: marine, oil and gas, chemical, pharmaceutical, and nuclear.
This EH series is interchangeable with PISTER SKH SERIES, MHA MKHP SERIES, HYDAC KHM SERIES, CIOCCA CRHI2 SERIES, and GEMELS GB2 SERIES. Steel Product. Two-way high-pressure ball valve (steel), used in various industries including construction, agricultural machinery, water engineering, mining engineering, and paint industries.
This EH series is interchangeable with STUCCHI VEP-P SERIES, PARKER FET SERIES, FASTER FHV SERIES, VOSWINKEL FT SERIES, DIXON VEP SERIES, and DNP PST4 SERIES. Steel Product. Engineered for demanding hydraulic systems, the 299 Series provides reliable performance in applications subject to extreme pressure impulses and residual line pressures. The innovative thread-to-connect design significantly reduces wear and prevents brinelling, while the internal valve technology enables safe connection and disconnection even under high residual pressure conditions. This series is used in a high wind application environment, and the safety pin lock will ensure the couplers are physically stable enough to perform properly.
This EH series is interchangeable with PARKER PD SERIES, DIXON PD SERIES, DNP PLD3 SERIES, FASTER DF SERIES, EATON AEROQUIP FD90 SERIES, BRAZIL DYNAMIC DIAGOSTICO SERIES, and HOLMBURY DTP SERIES. Steel Product. Hydraulic pressure measurement couplings featuring ISO 15171-1 compliant flat-face connections. The male component installs directly on hydraulic lines while the female interface connects to gauge instrumentation, enabling precise system pressure monitoring without fluid loss during connection/disconnection.
This EH series is interchangeable with PARKER 3000 SERIES, STUCCHI IV-HP SERIES, FASTER PVSM SERIES, CEJN 232 SERIES, DIXON T SERIES, DNP PVS SERIES, HANSEN WA56000 SERIES, and SAFEWAY S30 SERIES. Steel Product. These screw-to-connect couplings are engineered for ultra-high-pressure applications. Featuring a durable metal-to-metal sealing ball valve, these ISO 14540-compliant couplings deliver exceptional performance in demanding hydraulic systems.
This EH series is interchangeable with TURKEY FERRO STHD SERIES. Steel Product. The 84 series features poppet valve quick couplings that are specialized for Turkey, Iran, and the Middle East countries.
This EH series is interchangeable with PARKER 6600 SERIES, HANSEN HA15000 SERIES, VOSWINKEL IA-VA SERIES, FASTER NV STAINLESS STEEL SERIES, and DNP PAVX SERIES. Stainless Steel Product. The 73 series is a poppet-type quick coupler compatible with ISO 7241-1 “A” standards. Constructed from stainless steel, it ensures global interchangeability and is available in sizes from ¼” to 2”. Due to its versatility, the 73 series is widely used in hydraulic systems, particularly in agricultural and industrial applications.
UK Forged Brass Gas Ball Valve, Brass Product. UK Forged brass gas ball valve; yellow steel lever handle; ISO7/1 thread, EN331 standard, PN40~PN25 (5MOP).
Pneumatic Quick Coupling, Instant Air Couplings, Adaptors, Swivel Adaptors (Steel). Steel Product. This coupling system has a safety lock. To disconnect, the plug must first be twisted out from the coupling before it can be unlocked. This prevents unintentional disconnection.
This EH series is interchangeable with MHA NDRV SERIES, HYDAC DRV SERIES, PARKER F SERIES, and GEMELS RF SERIES. Steel Product. One-way valve for flow control use. Suitable for any type of hydraulic system using liquid that is not highly viscous. The standard type is in zinc-plated carbon steel. It is mainly used in non-corrosive mineral-based oils and liquids.
This EH series is interchangeable with MHA NDRV SERIES, HYDAC DRV SERIES, PARKER F SERIES, and GEMELS RF SERIES. Steel Product. Two-way high-pressure ball valve with flange (carbon steel), SAE J518C (ISO-6162) Standard, used in various industries including construction, agricultural machinery, water engineering, mining engineering, and paint industries.
This EH series is interchangeable with STUCCHI FIRG SERIES, DNP PLT1 SERIES, PARKER FF SERIES, EATON AEROQUIP FD 89 SERIES, DIXON HT SERIES, HANSEN QA29000 SERIES, and SAFEWAY FFE49 SERIES. Steel Product. The 95 Series, renowned as the original ISO 16028-compliant coupling solution, continues to deliver reliable performance, exceptional durability, and competitive value. Its innovative integrated sealing system significantly minimizes premature wear by effectively compensating for three critical stress factors: relative movement between coupling components, sudden pressure impulses, and the constant strain exerted by hose weight during horizontal operation.
This EH series is interchangeable with DNP VVV1 SERIES, FASTER VVS SERIES, PARKER QHPA SERIES, and VOSWINKEL HH SERIES. Steel Product. High-pressure screw-on couplings are engineered for extreme working conditions with frequent pressure spikes. The heavy-duty internal construction ensures optimal safety and reliability. Market Interchange.
This EH series is interchangeable with HANSEN HA15000 SERIES, PARKER 6600 SERIES, EATON AEROQUIP 5600 SERIES, FASTER ANV SERIES, FASTER AGRI SERIES, DNP PAV1 SERIES, STUCCHI BIR SERIES, STUCCHI IRV SERIES, DIXON K SERIES, VOSWINKEL IA SERIES, and SAFEWAY S56 SERIES. Steel Product. The 75 series is a poppet-type quick coupler compatible with ISO 7241-1 -A standards. Constructed from carbon steel with zinc plating, it ensures global interchangeability and is available in sizes from ¼'' to 2''. Due to its versatility, the 75 series is widely used in hydraulic systems, particularly in agricultural and industrial applications.
Brass Product. Brass taper male hose tail fittings, with BSPP taper male thread.
This EH series is interchangeable with MHA NDV SERIES, HYDAC DV SERIES, PARKER N SERIES, and GEMELS RF SERIES. Steel Product. One-way valve for flow control use. Suitable for any type of hydraulic system using liquid that is not highly viscous. The standard type is in zinc-plated carbon steel. It is mainly used in non-corrosive mineral-based oils and liquids.
This EH series is interchangeable with MHA MKHP-SAEFS SERIES, HYDAC KHM-F3/6 SERIES, GEMELS GBS3 SERIES, and GEMELS GBS6 SERIES. Steel Product. 2-way high-pressure forged ball valve with flange (steel), SAE J518C (ISO-6162) Standard, used in various industries including construction, agricultural machinery, water engineering, mining engineering, and paint industries.
This EH series is interchangeable with STUCCHI A SERIES, FASTER FFH SERIES, PARKER FEM SERIES, CEJN X65 SERIES, DIXON HT SERIES, DNP PLT4 SERIES, VOSWINKEL FH SERIES, and GROMELLE 629-A SERIES. Steel Product. The Premier Series Flat Face Couplings, engineered to ISO 16028 interchange standards, deliver exceptional hydraulic performance with higher pressure ratings, optimized flow efficiency, and reduced pressure drop—outperforming both EH 95 Series and competing products. Designed for critical no-leak applications, these couplings feature a non-spill flat-face valve system that eliminates fluid loss during coupling/uncoupling, making them the ideal choice for contamination-sensitive hydraulic systems. Their precision engineering ensures reliable operation while maintaining full ISO compatibility for seamless integration.
This EH series is interchangeable with DNP PVG1 SERIES, GROMELLE W6000 SERIES, INTEVA TGW SERIES, VOSWINKEL HB SERIES, EATON W6000 SERIES, and STAUFF HB SERIES. Steel Product. High-pressure screw-on couplings engineered for extreme working conditions with frequent pressure spikes. The heavy-duty internal construction ensures optimal safety and reliability. Market Interchange.
This EH series is interchangeable with PISTER RKH SERIES, MHA BKH SERIES, HYDAC KHM SERIES, and GEMELS GE2 SERIES. Stainless Steel Product. 2-way high-pressure ball valve (AISI 316Ti), used in various industries including construction, agricultural machinery, water engineering, mining engineering, and paint industries.
This EH series is interchangeable with PARKER FH SERIES, STUCCHI A-HP SERIES, CEJN 265 SERIES, FASTER FFHP SERIES, and DNP PLT7 SERIES. Steel Product. Engineered for extreme hydraulic systems, these 72 MPa-rated couplings deliver uncompromising performance in critical high-pressure applications. To ensure operational safety, this series is intentionally incompatible with standard ISO 16028 or low/medium-pressure flat-face couplings, preventing risky cross-connections. Instead, it pairs exclusively with dedicated high-pressure counterparts available on the market. An innovative rotating sleeve on the female half automatically engages post-connection, providing a fail-safe lock against accidental disengagement under pressure.
This EH series is interchangeable with SNAP-TITE 71 SERIES, DIXON ST SERIES, FASTER OGF SERIES, DNP PLS1 SERIES, and PARKER 71 SERIES. Steel Product. 136 couplings provide versatile performance across diverse hydraulic applications, combining advanced sealing technology with user-friendly operation. The flat-face design ensures zero fluid spillage while effectively preventing external contamination, making them ideal for clean and efficient systems. Featuring intuitive push-to-connect technology, these couplings simplify installation while the integrated locking ball mechanism secures connections and prevents accidental disengagement. 136 couplings are fully interchangeable with Snap-tite 71 series, ensuring broad compatibility and easy integration into existing systems.
This EH series is interchangeable with DNP VVVX SERIES, FASTER VVS STAINLESS STEEL SERIES, VOSWINKEL HH-VA SERIES, and STAUFF HH-VA SERIES. Stainless Steel Product. High-performance AISI 316 stainless steel screw couplings engineered for extreme-pressure applications. Features corrosion-resistant construction, heavy-duty internal components.
This EH series is interchangeable with PISTER RKH SERIES, MHA BKH SERIES, HYDAC KHM SERIES, and GEMELS GE2 SERIES. Stainless Steel Product. Two-way high-pressure ball valve (AISI 316), used in various industries including construction, agricultural machinery, water engineering, mining engineering, and paint industries.
This EH series is interchangeable with STUCCHI A-HD SERIES, PARKER FEM SERIES, FASTER 3FFH SERIES, VOSWINKEL FH SERIES, VOSWINKEL FF SERIES, and VOSWINKEL FU SERIES. Steel Product. These ISO 16028-compliant flat face couplings are engineered for demanding hydraulic applications, featuring a robust 35 MPa (5076 psi) working pressure rating and durable zinc-nickel plating for superior corrosion resistance. The innovative design allows safe connection under residual pressure conditions with multiple configuration options.
This EH series is interchangeable with PARKER TC SERIES. Steel Product. 151 Series is used in high pressure applications with hydraulic and mechanical shock. Available in 3/8'' size only. Widely used in hydraulic jacking and house moving equipment, construction equipment and railway maintenance.
This EH series is interchangeable with PISTER HBKH SERIES. Steel Product. This series has a stroke limitation function on single-action cylinders, e.g., tilt cylinders or lifting platforms for hydraulically powered machines.
This EH series is interchangeable with STUCCHI APM SERIES, PARKER FEC SERIES, FASTER 3FFH SERIES, FASTER 3FFI SERIES, DIXON HTE SERIES, CEJN X64 SERIES, DNP PLK4 SERIES, SAFEWAY FFEC49 SERIES, and VOSWINKEL FU SERIES. Steel Product. These ISO 16028-compliant flat face couplings are engineered for demanding hydraulic applications, featuring a robust 35 MPa (5076 psi) working pressure rating and durable zinc-nickel plating for superior corrosion resistance. The innovative design allows safe connection under residual pressure conditions with multiple configuration options.
This EH series is interchangeable with CEJN 115 SERIES, VOSWINKEL HC SERIES, FASTER UHP 100 SERIES, and DNP PCJ5 SERIES. Steel Product. Representing EH's most advanced hydraulic coupling technology, the 155 series is engineered for extreme-pressure applications exceeding 100 MPa. These couplings combine unparalleled reliability with robust construction, featuring redundant safety systems that incorporate both visual indicators and mechanical interlocks. Designed for mission-critical operations, the 155 series delivers exceptional performance where standard hydraulic connections would fail, making it the premier solution for ultra-high-pressure systems demanding absolute operational security and durability.
This EH series is interchangeable with MHA PKH SERIES, PISTER BKHU SERIES, HYDAC KHP SERIES, GEMELS GPK2 SERIES, and HYDAC KHP3K SERIES. Steel Product. Two-way high-pressure ball valve (steel). Mainly used in hydraulics, particularly in the construction industry and agricultural machinery, water engineering, mining engineering, and paint industries.
This EH series is interchangeable with CEJN 116 SERIES, VOSWINKEL HD SERIES, FASTER UHP 150 SERIES, DNP PCJ6 SERIES, and PARKER HP SERIES. Steel Product. Representing EH's most advanced hydraulic coupling technology, the 156 series is engineered for extreme-pressure applications exceeding 150 MPa. These couplings combine unparalleled reliability with robust construction, featuring redundant safety systems that incorporate both visual indicators and mechanical interlocks. Designed for mission-critical operations, the 156 series delivers exceptional performance where standard hydraulic connections would fail, making it the premier solution for ultra-high-pressure systems demanding absolute operational security and durability.
This EH series is interchangeable with DK V86 SERIES and DK VC86 SERIES. Steel / Stainless Steel Product. Two-way high-pressure CNG ball valve (steel, stainless steel). Mainly used in hydraulics, particularly in the construction industry and agricultural machinery, water engineering, mining engineering, and paint industries.
This EH series is interchangeable with PISTER BK3 SERIES, MHA BK3 SERIES, HYDAC KHB3K SERIES, GEMELS GE3 SERIES, and CIOCCA CRHI3 SERIES. Steel Product. Three-way high-pressure ball valve -L Type (steel), used in various industries including construction, agricultural machinery, water engineering, mining engineering, and paint industries.
This EH series is interchangeable with PISTER BK3 SERIES, MHA BK3 SERIES, HYDAC KHB3K SERIES, GEMELS GE3 SERIES, and CIOCCA CRHI3 SERIES. Steel Product. Three-way high-pressure ball valve (steel)-T Type, used in various industries including construction, agricultural machinery, water engineering, mining engineering, and paint industries.
This EH series is interchangeable with PISTER BK3 SERIES, MHA BK3 SERIES, HYDAC KHB3K SERIES, GEMELS GE3 SERIES, and CIOCCA CRHI3 SERIES. Stainless Steel Product. Three-way high-pressure ball valve (Stainless Steel 316)-L Type, used in various industries including construction, agricultural machinery, water engineering, mining engineering, and paint industries.
This EH series is interchangeable with PISTER BK3 SERIES, MHA BK3 SERIES, HYDAC KHB3K SERIES, GEMELS GE3 SERIES, and CIOCCA CRHI3 SERIES. Stainless Steel Product. Three-way high-pressure ball valve (Stainless Steel 316)-T Type, used in various industries including construction, agricultural machinery, water engineering, mining engineering, and paint industries.
This EH series is interchangeable with PARKER 60 SERIES, DIXON H SERIES, EATON AEROQUIP FD45 SERIES, FASTER HNV SERIES, DNP PBV1 SERIES, STUCCHI IRB SERIES, HANSEN HK SERIES, SAFEWAY S10 SERIES, VOSWINKEL IB SERIES, and GROMELLE 635-A SERIES. Steel Product. Industrial-grade standard couplings compliant with ISO 7241-1 Series B. Full size range available from 1/8" to 2" with multiple thread options (BSP, NPT, SAE). Designed for reliable performance in demanding industrial environments.
This EH series is interchangeable with PARKER 60 SERIES, DIXON H SERIES, EATON AEROQUIP FD45 SERIES, FASTER HNV STAINLESS STEEL SERIES, DNP PBVX SERIES, STUCCHI IRBX SERIES, HANSEN HK SERIES, SAFEWAY SS10 SERIES, VOSWINKEL IB-VA SERIES, and GROMELLE 635-Z SERIES. Stainless Steel Product. Standard couplings for industrial applications with stainless steel components (AISI 316). ISO 7241 part B interchange.
This EH series is interchangeable with DNP PBOX SERIES. Stainless Steel Product. As the free-flow version of the 83 series, 80 couplings feature an open-passage design with no internal valves, ensuring higher flow efficiency and reduced pressure loss. ISO 7241 part B interchange.
This EH series is interchangeable with PARKER H SERIES, PARKER IH SERIES, SNAP-TITE H SERIES, SNAP-TITE IH SERIES, DIXON V SERIES, FASTER TNV SERIES, FASTER TNL SERIES, DNP PNVX SERIES, DNP PNOX SERIES and STUCCHI SH SERIES. Stainless Steel Product. 103 series couplings are commonly used in US market as an alternative to standard series. Their valves have been designed to help flow and to allow connection with 104 parts (free flow) same series. AISI SS316 Material.
This EH series is interchangeable with PARKER H SERIES, PARKER IH SERIES, SNAP-TITE H SERIES, SNAP-TITE IH SERIES, DIXON V SERIES, FASTER TNV SERIES, FASTER TNL SERIES, DNP PNV1 SERIES, DNP PNO1 SERIES and STUCCHI SH SERIES. Steel Product. 105 series couplings are commonly used in US market as an alternative to standard series. Their valves have been designed to help flow and to allow connection with 106 parts (free flow) same series. Carbon Steel.
This EH series is interchangeable with PARKER H SERIES, PARKER IH SERIES, SNAP-TITE H SERIES, SNAP-TITE IH SERIES, DIXON V SERIES, FASTER TNV SERIES, FASTER TNL BRASS SERIES and STUCCHI SH SERIES. Brass Product. 101 series couplings are commonly used in US market as an alternative to standard series. Their valves have been designed to help flow and to allow connection with 107 parts (free flow) same series. Brass.
This EH series is interchangeable with the FASTER VVM SERIES. Steel Product. VVM couplings feature a screw-to-connect sleeve and a metal-to-metal sealing mechanism upon disconnection. They utilize a poppet valve for positive shut-off.
This EH series is interchangeable with the FASTER HNVN SERIES. Steel Product. Standard couplings for industrial applications, interchangeable for the Japanese market.
This EH series is interchangeable with the FASTER NL SERIES. Steel Product. 61 couplings feature an open-passage design with no internal valves, ensuring higher flow efficiency and reduced pressure loss.
This EH series is interchangeable with FASTER AGRI ZINC-NICKEL SERIES, FASTER NV ZINC-NICKEL SERIES, and FASTER ANV ZINC-NICKEL SERIES. Steel Product. The 175 series is compatible with ISO 7241-1 -A standards. Constructed from steel with zinc-nickel plating. It is widely used in hydraulic systems, particularly in agricultural and industrial applications.
Categories
Contact Person
- Name:
- NINGBO E.H HYDRAULIC CO., LTD.
- Tel:
+0086-574-27882700
- Email:
- sales@ehhydraulics.com
- WhatsApp:
- 8613967841269
- Address:
- No.7 Longteng Road, Maoshan Industrial Area, Jiangshan, Yinzhou District, Ningbo, China, 315193