Used Milking Parlor for sale (224)

Condition: excellent (used), functionality: fully functional, Year of construction: 2014, Used BouMatic milking robot for sale Model: MR D1 GENOMI UP Ndjdpfextux Ejx Aa Aod DOUBLE BOX – simultaneous milking of 2 cows Capacity: up to 120 cows Post-milking teat cup disinfection – mini dos system Post-milking teat disinfection Year of manufacture: 2014 Commissioned: 2015 2x concentrate feeders 1x liquid feed dispenser Robot software updated to GENOMI UP version on November 15, 2023 (proof of update available) Touchscreen display Computer included Complete set of teat cups 3D camera Dual-arm system Vacuum pump replaced in October 2024 (proof of replacement available)

Condition: new, Year of construction: 2025, functionality: fully functional, machine/vehicle number: Fb001, warranty duration: 12 months, total height: 1,000 mm, total width: 800 mm, total length: 1,100 mm, type of input current: three-phase, overall weight: 100 kg, power of the servo motor: 1 W, film width: 38 mm, compressed air connection: 0.25 bar, input voltage: 220 V, nominal power: 0.5 kW (0.68 HP), heating capacity: 0.8 kW (1.09 HP), Equipment: CE marking, Performance and features: Nsdpfx Aoxmwkqea Aedd 1). The machine is mainly made of quality stainless steel; the parts contact the material is made of 304# stainless steel and food grade plastic tubes and comply with hygienic standards for food; 2).It can fullfill accurate filling and capping at one operating position. 3). The machine uses flow meter for filling which is with high filling precise. 4). All its pneumatic and electric parts are from world famouse brand which are good quality. 5). can achieve vacuum pumping before they are filled, thereby helping extend the shelf life of the product. 6) Can add nitrogen function according to clients requirement. Application: It can be widely used in bag-in-box filling applications for such liquid materials as wine, edible oil, fruit juice, additives, milk, syrup, alcoholic beverages and concentrated seasonings.suitable for all kinds of bags and caps.

Year of construction: 2025, condition: new, I have a packaging machine for sale for bulk goods such as flour, sugar, powdered milk, spices, and much more. The packaging capacity is 5-30kg in paper or plastic bags. the price 13 500 EUR including 1- screw feeder 2- packing machine 5-30kg - Power supply: 2.5kW 400V 50Hz - Packaging accuracy: +/- 1% Nsdpfx Ajxfaptea Aodd - Packaging speed: 200-400 bags per hour (at 10kg) - Set weight: 190kg - Set dimensions: 1000x850x2300mm For highly dusty products, an additional dust extractor can be connected. Price 13 500 EUR - EXW terms INVITE TO INQUIRE

Condition: excellent (used), functionality: fully functional, input voltage: 400 V, warranty duration: 6 months, total width: 505 mm, total length: 1,010 mm, total height: 500 mm, DGUV certified until: 12/2026, type of input current: three-phase, overall weight: 49 kg, conveyor belt width: 100 mm, year of last overhaul: 2025, Broma milk bun pusher Milk roll / piece of dough pusher for manual assignment/ one-man operation Adjustable pressure setting long exit belt desktop device Njdpfxeidp Nme Aa Aodd DGUV V3 tested Connection 400V, 16A-CEE plug Used machine overhauled with 6 months warranty Visit our big bakery machines exhibition!

Condition: used, maximum load weight: 35,390 kg, overall weight: 43,500 kg, axle configuration: 3 axles, first registration: 06/2012, loading space volume: 36 m³, Equipment: ABS, Milk tank body, insulated stainless steel tank, capacity 36,000 liters, "ROTAIR" pump type: VRK200, output 1,600 L/min, 8 bar, VSE Dynamic System Control, right-side central outlet, walkway with mechanically folding railing on tank, drop supports at the front, centralized lubrication system, 1 x revolving warning beacon at the rear, ABS, EBS, "M. Benz" axle(s), 1st and 3rd axle are lift axles, 1st and 3rd axle(s) are steerable, air suspension with lift/lower function, disc brake system. Vehicle may have advertising decals and/or lettering applied. Nodoxyn E Sspfx Aa Ajdd Our offer generally does not include new TÜV (roadworthiness) certification. Should you require a new TÜV certification, we are happy to provide a quote from our partner workshops! The vehicle may have advertising decals and/or lettering applied. Our general terms and conditions of delivery and payment apply. We would be pleased to provide you with a financing or leasing offer for this vehicle. Please contact us!

Condition: excellent (used), Year of construction: 2010, the complete Tetra Pak volume conversion kit A3 Flex 200/250 ml Square, version machine 100/150. Packed into original wooden Tetra Pak boxes. Excellent condition. Ndsdpof Th Sxofx Aa Ajd Location - Poland

Condition: good (used), Item: A-12.000-MKT Ndodpsh E Dpiefx Aa Ajd MKT Cheese PrePress Line in good condition, capacity 12.000 L Please contact us for more information.

Condition: new, Year of construction: 2025, functionality: fully functional, machine/vehicle number: MZBF-003, total width: 1,050 mm, total length: 800 mm, total height: 1,500 mm, empty load weight: 80 kg, space requirement width: 1,100 mm, space requirement length: 1,000 mm, space requirement height: 16,000 mm, Equipment: CE marking, Semi-automatic bag-in-box filling machine is specially designed for bag-in-box filling,Adopt plunger pump to measure filling with high filling precision. And easy to adjust filling volumes. It is widely used for filling wine, juice, milk, water, and other beverage. 1). The machine is mainly made of quality stainless steel; the parts contact the material is made of 304# stainless steel and food grade plastic tubes and comply with hygienic standards for food; 2).It can fullfill accurate filling and capping at one operating position. 3). The machine uses flow meter for filling which is with high filling precise. Nedjxv Rqiopfx Aa Aedd 4). All its pneumatic and electric parts are from world famouse brand which are good quality. 5). can achieve vacuum pumping before they are filled, thereby helping extend the shelf life of the product.

Year of construction: 2018, operating hours: 300 h, condition: like new (used), functionality: fully functional, Up to 500 coffees per day. €26,900 ORIGINAL PRICE. COMPLETELY REFURBISHED by WMF factory service approx. 3 months ago. This is the top model of the 9000 series from WMF, the WMF 9000S+. The coffee machine has only about 79,000 brew cycles, so it's practically LIKE NEW. First commissioned in 2018 and has been regularly maintained; after the servicing, the machine was newly calibrated and configured. About 2 months ago, it underwent a full overhaul costing several thousand euros and has not been in use since. All wear parts were replaced by WMF service, and a new water filter was installed. The machine is connected and can be tested by appointment. For more details, see the original photos. The machine features 1x container for cocoa, 2x containers for coffee beans, touchscreen operation, and all coffee settings are adjustable, etc. Also included are a cleaning container and several cleaning tablets. A contact for installation can also be provided. Absolutely EXCELLENT CONDITION, weight approx. 100 kg! With three-phase power connection, COLLECTION ONLY, NO SHIPPING. A connection for an external milk container is also included. Nedpoxyzntefx Aa Ajdd

Condition: like new (used), Year of construction: 1999, operating hours: 500 h, functionality: fully functional, machine/vehicle number: 87.99.167, pressure: 50 bar, pressure (max.): 65 bar, input voltage: 400 V, type of input current: AC, Homogenizer Test Plant - Very Little Operation Was used in a test and pilot plant. Originally designed for homogenizing cream cheese (UF concentrate from feta production) Capacity approx. 400 l/h Ndsdpfeway Rpex Aa Aed Drive pulley conversion kit for up to approx. 700 l/h included Machine fully functional and in good working order.

Condition: used, Year of construction: 2016, operating hours: 10,538 h, Used Tetra Pak A3 Compact Flex 300V Aseptic Carton Filling Machine + TSA21 straw applicator YOM 2007 –  Overview This used Tetra Pak A3 Compact Flex 300V aseptic carton filling machine is designed for high-efficiency packaging of liquid foods in the 200 ml Slim format. With a capacity up to 9,000 units per hour, it offers reliable performance for beverage production and industrial packaging operations seeking second-hand equipment with proven quality. Manufactured by Tetra Pak, a leading name in packaging machinery, this filler supports aseptic processing for sensitive products such as milk and juices, making it a strong choice for modern Usedbottlinglines and carton packaging applications. Engineered for advanced aseptic filling performance, the A3 Compact Flex 300V combines process control, operational safety, and consistent output. The machine has been maintained to align with contemporary standards, ensuring dependable uptime, product integrity, and efficient changeovers in demanding beverage production environments. Technical Specifications & Performance Data Manufacturer: Tetra Pak Model/Version: A3 Compact Flex 300V Year of manufacture: 2016 Production speed: up to 9,000 units/hour Primary format: 200 ml Slim Filling technology: Aseptic carton filling Recorded operating hours: 10,538 h (approx.) TSA21 straw applicator system Product examples: Milk, juices Container type: Carton packages Advanced Automation & Control Systems The system features an integrated control panel and HMI for process monitoring, recipe handling, and production diagnostics. Automated sequences support aseptic startup, steady-state operation, and controlled shutdown. The platform incorporates safety interlocks and guarding to protect operators while enabling quick access for cleaning and routine service. Tetra Pak engineering ensures coordinated control of forming, filling, and sealing steps for stable, repeatable performance. Production Line Integration Capabilities Ndodpfx Asxvpfroa Aod This filler integrates seamlessly into complete beverage production and industrial packaging lines. It is suitable for upstream UHT/ESL processing and downstream case packing, conveyors, and palletizing. The 200 ml Slim format aligns with standard secondary packaging solutions, supporting efficient logistics. The machine can operate as a core element in a second hand used bottling line configured for aseptic cartons. Machine Condition & Maintenance History Condition reported as perfect, with maintenance aligning the unit to modern standards for process control, performance, and operational safety. The machine is ready for operation and suitable for immediate deployment after installation and commissioning within the buyer’s plant. Operational Performance & Versatility Optimized for aseptic filling of dairy beverages and juices, this A3 Compact Flex 300V maintains product quality with controlled sterile conditions.

Condition: used, Year of construction: 2025, color: grey-black, empty load weight: 6 kg, first registration: 07/2025, fuel type: gasoline, gearing type: mechanical, TITLE: USED REMOVABLE STAINLESS STEEL TANKER WITH EMBOSSED FINISH, 3 COMPARTMENTS, FORMER MILK TRANSPORT REF: 25-U-95 TYPE: Embossed stainless steel tanker DIMENSIONS TOTAL TANKER LENGTH: 7.00 m Nedow Ep Uhepfx Aa Aodd TANK HEIGHT INCLUDING REMOVABLE FRAME: 2.60 m TANK VOLUME: 17,500 L WEIGHT: 31,000 kg COLOUR: Grey Subject to errors and/or omissions Prices shown are excluding VAT. Please contact our sales department for the latest offers and terms. For more information: Loris: +39 348 477 3001 URL: #theremovableexperts SCARRABILI AURORA operates in the purchase and sale of industrial and commercial vehicles, with a primary focus on the waste sector. Specialized in trucks, trailers, and hooklift equipment. With an available fleet of over 50 trucks and more than 150 hooklift bodies and containers, with and without cranes, ready for delivery. E.&O.E. Given the volume of listings and detailed specifications, Aurora recommends verifying all data with our sales staff.

Condition: used, empty load weight: 5,900 kg, overall weight: 38,000 kg, axle configuration: 3 axles, first registration: 08/2011, suspension: air, tire size: 385/65R22,5, Equipment: ABS, truck registration, Menci ALU chassis | Alloy wheels | Air suspension | Lift axle | SAF axles with disc brakes | Tyres: 385/65 R22.5 | Former milk tank | Errors, input mistakes, and prior sale reserved. Nedpoxtganofx Aa Ajdd

Condition: new, functionality: fully functional, Item: AL-10509-CSF Pump 7.5 kW CSF Inox Self-priming Pump – Type ASH 65-4-10/BM.CDPZTH1 Manufacturer: CSF Inox S.p.A. – Montecchio Emilia, Italy Model: ASH 65-4-10/BM.CDPZTH1 Year: 2017 Material: Stainless steel AISI 316L Power: 7.5 kW Nodpfxoxu N Sve Aa Asdd Speed: 1450 rpm Voltage: 400/690 V – 50 Hz ATEX certification: II 2G c T3 (Zone 1) Connection: 3″ sanitary fittings Condition: Very good, unused – stored in original wooden crate Description: High-quality stainless steel centrifugal pump from CSF Inox, suitable for use in hygienic and ATEX environments. The ASH-series pumps are designed for gentle and efficient transfer of liquid food products, beverages, dairy products, and chemical solutions. The low-speed 1450 rpm motor ensures smooth operation with minimal shear and foaming – ideal for milk, cream, wine, juice or CIP applications. Pump casing, impeller, and shaft are manufactured entirely from AISI 316L stainless steel, providing long service life and excellent corrosion resistance.

Year of construction: 2025, condition: new, Creamer, pulper, peanut butter maker machine (Stone mill creamer, pulper) The cream or butter produced has such a fine particle size that it flows out of the machine like oil, with no perceptible coarse particles. Machine function: Cream preparation, pumpkin seed grinding, coconut grinding. Suitable for creaming or pulping the following products: Oilseeds: - Peanuts, hazelnuts, almonds, walnuts, cashews - Pistachios, sunflower seeds, pumpkin seeds, hemp seeds, coconut - Soy milk (tofu), chickpeas (hummus) Water must be added when processing soy milk and chickpeas! Oilseeds must be heat treated before processing. Creaming fruits and vegetables: apricot, plum, pepper cream, garlic cream Motor: 4 kW 380V Capacity: 20–60 kg/h Cream fineness, particle size: 50–150 micron Ndodoxvrxzopfx Aa Ajd

Condition: good (used), Year of construction: 2015, functionality: fully functional, coolant tank capacity: 1,200 l, We are selling 2 x 1200L insulated cooling tanks with steering system and CIP functions. The tanks has been used to store our microalgae in our production processes. Both tanks are working very well. Ndjdpsxykmxsfx Aa Ajd

Condition: used, Year of construction: 1998, AVE Aurora 12/1 Filling Monoblock – Overview The AVE Aurora 12/1 Filling Monoblock is a compact filler-capper unit engineered for dairy applications, specifically designed for PET bottles used in milk and yogurt packaging. This second hand monoblock integrates filling and capping operations within a single synchronized frame to optimize space, efficiency, and hygiene on a used bottling line. Manufactured by AVE, a respected Italian brand in industrial packaging machinery, this model provides reliable performance for beverage production where gentle product handling and sanitary design are essential. With a capacity of up to 2,000 bottles per hour at 1.0L, the Aurora 12/1 supports common dairy formats such as 0.5L and 1.0L PET containers with a 38mm neck finish. Its 12/1 configuration denotes 12 filling valves and 1 capping head, offering a balanced throughput for medium-scale operations. The machine’s monoblock architecture simplifies line layout and reduces product exposure, making it a practical solution for milk and yogurt filling within industrial packaging environments. Technical Specifications & Performance Data Manufacturer: AVE Model: Aurora 12/1 Year of manufacture: 1998 Machine type: Filling Monoblock (filler + capper) Production speed: up to 2,000 bph at 1.0L Container types: PET bottles Bottle formats: 0.5L, 1.0L Neck finish: 38mm Nodpfsxurp Rsx Aa Aodd Configuration: 12 filling valves / 1 capping head Advanced Automation & Control Systems The monoblock configuration synchronizes filling and capping turrets for precise container handling and repeatable performance. The integrated design helps minimize handling steps and supports hygienic operation for dairy products. Quick mechanical adjustments facilitate format changes between 0.5L and 1.0L PET bottles, while the unified drive concept maintains stable throughput and consistent cap application. Safety guarding and interlocks are typically provided to protect operators and ensure consistent operation. Production Line Integration Capabilities This AVE monoblock is suited for inline integration with standard beverage production equipment such as infeed conveyors, bottle unscramblers or depalletizers upstream, and downstream labelers, inspectors, and packers. Its compact footprint helps simplify layout in existing used bottling lines. The machine handles 38mm neck PET bottles and supports typical dairy volumes, enabling flexible use across milk and yogurt SKUs within beverage production and industrial packaging environments. Machine Condition & Maintenance History The unit is offered as a second hand filling monoblock and is presented for sale in working condition, ready for operation subject to standard installation and commissioning procedures. As with any pre-owned bottling equipment, buyers are encouraged to verify specific maintenance records, conduct inspection, and confirm performance on their product and formats.

Condition: new, Year of construction: 2025, functionality: fully functional, warranty duration: 24 months, New filling machine / filler suitable for filling liquids, pastes, creams, oils, etc. Typical applications include: - Disinfectants - Shampoos - Creams - Honey - Jam - Milk - Yogurt - Water - Alcohol - Pesto - And more This is a robust machine powered by compressed air and 220V, fully Plug and Play! Ideal for small-batch filling operations. Even a small compressor is sufficient to operate this machine. A compressor can be supplied upon request. The filler features a 500ml cylinder, enabling a maximum fill volume of 500ml per cycle. For larger volumes, multiple cycles can be programmed. The minimum stroke is 50ml, and any volume between 50ml and 500ml can be dispensed in one cycle. Nsdperivwfefx Aa Asdd The unit comes with a large 25L hopper. Optionally, it is possible to connect the system to an IBC or 200L drum, allowing for faster processing of larger batches. The machine is equipped with a foot pedal and automatic mode. In automatic mode, it continuously fills, making high-volume filling quick and efficient. With the foot pedal, operators can fill at their own pace. Depending on operator speed and fill quantity, 15–25 units per minute can be achieved, making this a very fast machine. It weighs approximately 15–20kg and is easily placed on a tabletop. The entire structure is made of stainless steel, ensuring high quality and durability. If you have any questions, please email us; we are happy to assist you with this or other machines. We also offer a labelling machine that pairs perfectly with the filling machine. We strive to respond within 24 hours and are available on working days from 09:00 to 17:30.

Year of construction: 2022, condition: used, Colour: Grey Njdpfx Aoxyy Skea Aodd Dimensions (LxW): 250 x 91 cm

Condition: ready for operation (used), Year of construction: 2023, functionality: fully functional, 2 x Franke A1000 FM with SU12 CM cooling unit • Each with 2 grinders Nsdpfxjxxkqus Aa Aodd • One powder dispenser for drinking chocolate • i.Q Flow • Foammaster milk system • Cleanmaster cleaning system Extras: • 2x Brita water filters Purity C 1100 • 2x spare milk containers • Commissioned on 24.5.2023 • Professionally dismantled and stored on 31.10.25 • Counter readings on 31.10.25: 122,636 + 117,919 • Maintenance carried out according to manufacturer specifications • Machines are also available individually or with leasing takeover

Condition: used, maximum load weight: 18,300 kg, overall weight: 24,000 kg, axle configuration: 3 axles, first registration: 03/1993, loading space volume: 19 m³, total width: 2,500 mm, total height: 3,100 mm, Milk tank trailer, stainless steel tank body, capacity 19,000 liters, 3 compartments, 3 manhole covers, top filling, catwalk on tank, BPW axle(s), drum brake system, leaf suspension. Vehicle may display advertising stickers and/or lettering. Nsdoxthzyjpfx Aa Aedd Our offer is generally without new TÜV certification. If a new TÜV inspection is desired, we will be happy to provide a quote from our partner workshops! Vehicle may bear advertising stickers and/or lettering. Our general terms and conditions of delivery and payment apply. We would be happy to provide you with a financing or leasing offer for this unit. Please contact us!

Condition: good (used), Item: D6422-Cheeseform 30x30- Cheese molds Perfora Ndsdef Nk Rispfx Aa Aod Cheese moulds made by Perfora. Stainless Steel with lid Dimension: 300 X 300 X 160 About 80 pieces

Condition: used, Year of construction: 2008, operating hours: 34,590 h, Used Aseptic Filling Machine Tetra Pak A3/Flex 150V TBA 1000B – Overview This second hand Tetra Pak A3/Flex 150V TBA 1000B is a proven aseptic carton filler engineered for industrial packaging and beverage production. Configured for Tetra Brik Aseptic 1000 ml (Base) packs, it delivers reliable, continuous operation for UHT milk, juices, and other shelf-stable beverages. With a nominal capacity of approximately 7,000 packs/hour, this used bottling line component combines high throughput with aseptic integrity for modern carton packaging. Technical Specifications & Performance Data Manufacturer: Tetra Pak Model: A3/Flex 150V TBA 1000B Year of manufacture: 2008 Filling type: Aseptic (non-isobaric carton filling) Package format: Tetra Brik Aseptic 1000 ml (Base) Nominal speed: ≈ 7,000 packs/hour Working hours: ≈ 30,000 hours Utilities Electrical: 400 V, 50 Hz, 3-phase Ndodpfx Aajxt Eqro Aod Installed power: up to ≈ 50 kW (typ. 35–50 kW depending on configuration) Compressed air: 6–8 bar, ≈ 300–500 Nl/min Water/steam: ≈ 0.5–1.0 m³/h (for processing/sterilization utilities) Dimensions & Weight Approximate footprint (L × W × H): 7 × 3 × 4.5 m Approximate weight: ≈ 7,000 kg (model range 6,000–8,000 kg) Note: Technical values are indicative for this A3/Flex configuration and should be confirmed during inspection/FAT. Advanced Automation & Control Systems The A3/Flex platform features OEM PLC-based control with a touchscreen HMI for recipe handling, alarms, and diagnostics. Motion control synchronizes forming, filling, and sealing cycles to maintain aseptic integrity and packaging quality at high speeds. Typical capabilities include: Recipe management for UHT milk, juices, and beverage variants Integrated process supervision and event/alarm logs I/O provisions for upstream/downstream line devices Recommended verification prior to start-up: PLC functions, valve actuation, pump performance, and seal integrity Production Line Integration Capabilities This aseptic carton filler integrates efficiently within a used bottling line or new beverage production layout: Upstream: packaging material feed and sterilization modules as per OEM design Downstream: conveyors to accumulation, straw/cap applicators, case packers, palletizers Utilities/process: interfaces for CIP/SIP connection to plant systems, sterile air, water, and steam Controls: standard digital/analog I/O and fieldbus-ready architecture depending on configuration Ideal for second hand industrial packaging projects requiring aseptic carton formats and stable high-speed operation. Machine Condition & Maintenance History Condition: used, currently in storage Approximate machine hours: ≈ 30,000 Operational note: continuous production achievable with proper preventive maintenance Recommended checks before commissioning: pumps, aseptic valves, PLC functionality, elastomers and seals Routine inspection, replacement of wear parts, and validation of aseptic barriers are advised prior to restart.

Condition: excellent (used), functionality: fully functional, usable tank capacity: 60,000 l, total height: 11,500 mm, inner diameter: 2,900 mm, outer diameter: 3,000 mm, wall material: stainless steel, Agitator Tank made of Stainless Steel (V2A), Insulated (Milk Tank) Technical Data / Dimensions Available quantity: 5 Volume: approx. 60,000 liters Tank type: Agitator tank Condition: used Food-grade: yes Design: vertical Internal diameter: approx. 2,900 mm External diameter: approx. 3,000 mm Cylindrical height: approx. 8,100 mm Total height: approx. 11,500 mm Specific gravity of medium: 1.0 t/m³ Operating pressure: non-pressurized Operating temperature: 40°C Notes: former milk storage tank Material / Construction Internal shell material: V2A (1.4301) Foot material: stainless steel Internal weld seams: ground smooth Insulation Insulation thickness: approx. 50 mm Insulation material: PU foam Insulation shell material: stainless steel Insulation shell: diffusion-tight welded Notes: The insulation shell of the tank has some minor dents which do not affect its functionality. Equipment Support design: foot ring / support skirt Mounting: fixed Top head: conical Cone angle: approx. 15% Nsdpfjxw Rrpex Aa Aodd Bottom head: conical Top head features: 1 x vent hood with mesh 1 x CIP nozzle 1 x threaded socket for level limit measurement 2 x lifting lugs Shell features: 1 x oval manway, swing-type (approx. 340 x 440 mm) 1 x oval manway (approx. 340 x 440 mm, in support skirt) 1 x agitator flange with agitator 1 x threaded nozzle for temperature measurement Bottom head features: 1 x threaded nozzle for temperature measurement 1 x nozzle for level limit measurement 1 x residue drain Notes: The connection configurations differ slightly between the 5 tanks Agitator Agitator included Type: propeller Classification: high-speed Quantity: 1 Mounting position: lateral Speed: 940 rpm Agitator power: 2.2 kW Impeller length: approx. 600 mm Manufacturer: Stelzer Notes: Some agitators supplied with stainless steel cover

Condition: used, Used GEA Niro Soavi Type NS 3110 Stainless steel high-pressure homogenizer, sanitary design Stages: 2 Capacity Min: 1,200 Max: 6,000 L/h Nodpfx Aexr Nybsa Aodd Pressure: Up to 450 bar Motor power: 90 kW 380 V 50 Hz