Afaatim - Content

Signs & Symbols Terms Starting With Numbers Meas. Unit & Conv.

Aa Ab Ac Ad Ae Af Ag Ah Ai Aj Ak Al Am An Ao Ap Aq Ar As At Au Av Aw Ax Ay Az

Ba Bb Bc Bd Be Bf Bg Bh Bi Bj Bk Bl Bm Bn Bo Bp Bq Br Bs Bt Bu Bv Bw Bx By Bz

Ca Cb Cc Cd Ce Cf Cg Ch Ci Cj Ck Cl Cm Cn Co Cp Cq Cr Cs Ct Cu Cv Cw Cx Cy Cz

Da Db Dc Dd De Df Dg Dh Di Dj Dk Dl Dm Dn Do Dp Dq Dr Ds Dt Du Dv Dw Dx Dy Dz

Ea Eb Ec Ed Ee Ef Eg Eh Ei Ej Ek El Em En Eo Ep Eq Er Es Et Eu Ev Ew Ex Ey Ez

Fa Fb Fc Fd Fe Ff Fg Fh Fi Fj Fk Fl Fm Fn Fo Fp Fq Fr Fs Ft Fu Fv Fw Fx Fy Fz

Ga Gb Gc Gd Ge Gf Gg Gh Gi Gj Gk Gl Gm Gn Go Gp Gq Gr Gs Gt Gu Gv Gw Gx Gy Gz

Ha Hb Hc Hd He Hf Hg Hh Hi Hj Hk Hl Hm Hn Ho Hp Hq Hr Hs Ht Hu Hv Hw Hx Hy Hz

Ia Ib Ic Id Ie If Ig Ih Ii Ij Ik Il Im In Io Ip Iq Ir Is It Iu Iv Iw Ix Iy Iz

Ja Jb Jc Jd Je Jf Jg Jh Ji Jj Jk Jl Jm Jn Jo Jp Jq Jr Js Jt Ju Jv Jw Jx Jy Jz

Ka Kb Kc Kd Ke Kf Kg Kh Ki Kj Kk Kl Km Kn Ko Kp Kq Kr Ks Kt Ku Kv Kw Kx Ky Kz

La Lb Lc Ld Le Lf Lg Lh Li Lj Lk Ll Lm Ln Lo Lp Lq Lr Ls Lt Lu Lv Lw Lx Ly Lz

Ma Mb Mc Md Me Mf Mg Mh Mi Mj Mk Ml Mm Mn Mo Mp Mq Mr Ms Mt Mu Mv Mw Mx My Mz

Na Nb Nc Nd Ne Nf Ng Nh Ni Nj Nk Nl Nm Nn No Np Nq Nr Ns Nt Nu Nv Nw Nx Ny Nz

Oa Ob Oc Od Oe Of Og Oh Oi Oj Ok Ol Om On Oo Op Oq Or Os Ot Ou Ov Ow Ox Oy Oz

Pa Pb Pc Pd Pe Pf Pg Ph Pi Pj Pk Pl Pm Pn Po Pp Pq Pr Ps Pt Pu Pv Pw Px Py Pz

Qa Qb Qc Qd Qe Qf Qg Qh Qi Qj Qk Ql Qm Qn Qo Qp Qq Qr Qs Qt Qu Qv Qw Qx Qy Qz

Ra Rb Rc Rd Re Rf Rg Rh Ri Rj Rk Rl Rm Rn Ro Rp Rq Rr Rs Rt Ru Rv Rw Rx Ry Rz

Sa Sb Sc Sd Se Sf Sg Sh Si Sj Sk Sl Sm Sn So Sp Sq Sr Ss St Su Sv Sw Sx Sy Sz

Ta Tb Tc Td Te Tf Tg Th Ti Tj Tk Tl Tm Tn To Tp Tq Tr Ts Tt Tu Tv Tw Tx Ty Tz

Ua Ub Uc Ud Ue Uf Ug Uh Ui Uj Uk Ul Um Un Uo Up Uq Ur Us Ut Uu Uv Uw Ux Uy Uz

Va Vb Vc Vd Ve Vf Vg Vh Vi Vj Vk Vl Vm Vn Vo Vp Vq Vr Vs Vt Vu Vv Vw Vx Vy Vz

Wa Wb Wc Wd We Wf Wg Wh Wi Wj Wk Wl Wm Wn Wo Wp Wq Wr Ws Wt Wu Wv Ww Wx Wy Wz

Xa Xb Xc Xd Xe Xf Xg Xh Xi Xj Xk Xl Xm Xn Xo Xp Xq Xr Xs Xt Xu Xv Xw Xx Xy Xz

Ya Yb Yc Yd Ye Yf Yg Yh Yi Yj Yk Yl Ym Yn Yo Yp Yq Yr Ys Yt Yu Yv Yw Yx Yy Yz

Za Zb Zc Zd Ze Zf Zg Zh Zi Zj Zk Zl Zm Zn Zo Zp Zq Zr Zs Zt Zu Zv Zw Zx Zy Zz

Ball-And-Seat Valve

Ball-And-Seat Valve : (n) A device used to restrict fluid flow to one direction. It consists of a polished sphere, or ball, usually of metal, and an annular piece, the seat, ground and polished to form a seal with the surface of the ball. Gravitational force or the force of a spring holds the ball against the seat. Flow in the direction of the force is prevented, while flow in the opposite direction overcomes the force and unseats the ball

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Ref:

US Department of Labor, Occupational Safety & Health Administration (OSHA), Oil and Gas Well Drilling and Servicing eTool, Washington, DC. This is an abridged version of the Dictionary of Petroleum Terms provided by Petex and the University of Texas Austin, USA 2001. http://www.osha.gov/SLTC/etools/oilandgas/glossary _of_terms/glossary_of_terms_a.html, (Oil Well Drilling Sci and Tech - Amer) {492}