9/5/2023 0 Comments Theoben gas ram pressure![]() If you are sending the old part please make a note of this in the ‘Comments’ section of your order. We can only send pistons to you direct if you first send the old part to us for exchange. If you enter an incorrect shipping address, a £2.50 administration fee will apply upon refund to rectify the error. YOU MUST ENTER YOUR NOMINATED RFD'S ADDRESS UPON CHECKOUT.ĭO NOT ORDER UNLESS YOU DO THIS or intend to collect in person from our shop. This item can only be sent to a Registered Firearms Dealer PLEASE BE READ CAREFULLY BEFORE CONTINUING Once an order has been processed, goods must be cancelled/returned as per our Returns Policy.Īny work undertaken as a ‘special order’ cannot be cancelled or returned once work has commenced or order has been despatched. Orders may be cancelled or altered prior to despatch only. All damaged packages MUST be either refused or signed RECEIVED DAMAGED and in either case we must be advised of damage goods within three days of delivery. Please examine all packages prior to receipt as signatures are taken as proof of receipt in good condition. It is ALWAYS safer to select the recorded delivery option for shipping to guarantee delivery of goods. If this method of shipping is selected by the buyer, John Knibbs International Ltd will not be held responsible for any loss, damage or non-delivery of the purchased items. When selecting our ‘Unrecorded Delivery At Buyer's Risk’, it means just that – the onus for non-delivery is held firmly with the buyer as John Knibbs International Ltd have no way of tracking or tracing the items once they have been collected from our premises. The cost of postage will not be included unless good are received faulty, in which case we will issue a replacement, we will also refund the cost of postage. Provided goods are returned to us in their original condition, packaging, and with all labels still attached, we will refund the cost of the goods, minus a 20% restocking charge. Please note that the Gauge Kit is an additional accessory for reference checking and is not included in the Standard Pump KitShould you not be satisfied with goods correctly received, please ensure you return them within 10 days from the date of delivery. Use in conjunction with a good quality chronograph to ensure the power level stays within the legal limit for your country. Features BEST Fittings’ Gas Ram Adaptor with quick detach kit for ease of operation. “Slim Jim” Gas Ram Pump kit for adjusting your Theoben / Weihrauch Gas Ram pressure. It takes a bit of practice to do without a “POP” and a cloud of oily air being evident. If I go over the 12ft/lb limit I gently tap the valve with a pin punch about “PFFFFFFT” is enough.To achieve FAC velocity the stroke is increased to 3.2 inches the eliminator has a stroke of 3.7 inches. The diameter of the (dummy piston) or gas ram on the “HE” model is 1/3 of that of the earlier one and the pressure goes up from 300 psi non “HE” to 750 psi “HE”. The stroke of the piston on a 12 ft lbs Theoben gas ram is 2.6 inches “HE” or not.It needs more pressure because the later Theoben’s have a short stroke length of just over two inches, with a cylinder bore of just over an inch.What is “HE” and why does it need more pressure? “HE” = high efficiency.The pre-HE models run with half or less of the “HE” pressure.If it takes that much to get 11+ftlb, then the gun needs new breech, piston and ram seals. More than 1000PSI risks damage to the ram. 800-850 is most common, but I’d suggest to start at 700PSI and work upwards. The “HE” models (HE will be stamped on top of the breech) run at 700-1000PSI, depending on barrel length, calibre and the condition of the gun.Some useful information from: AirgunBBS Forum Thread 245395 Want to purchase the cutting edge FX Airguns Pocket Chronograph from our store? BUY HERE 1-BA, and Standard Schrader Valve threads.ĭO NOT USE A DIVE CYLINDER. Bottom Entry Gauge – Charging Kit Gauges. ![]() Rear Entry Gauges – Cylinder Valve Gauges.HPA Paintball and Airsoft Tank Filling Equipment.
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